Database Users

Triangle with exclamation mark?

Hi, I just got my HTC HD2 back from repair. Before I sent it, I had a problem reflashing to stock rom before sending it in, and stock HSPL... when I turn the power on, all I get is a white triangle with an exclamation mark in the middle...i thought if i sent it in like that, they would help me restore it but they didn't....how do i get my phone to work again ]:

enter bootloader, flash a compatible stock rom. phone should be fine.
whilst in bootloader take note of what spl says.

Everytime I try to flash a ROM, it gives me the ERROR [294]: INVALID VENDER ID error...
right now my phone is stuck on the bootloader screen...it says
HX-BC
SPL-1.42.0000 XE
MicroP(LED) 0x05
MicroP(TOUCH) 0x40
and if i take out my SD card, when I turn the power on, i get the triangle exclamation mark ]:

I take it its a stock rom you are trying to flash?

I'm not positive which is the stock rom for my phone. It's the HTC Leo HD2 T8585...I remember it being 1.66 but i'm not positive. I downloaded
RUU_Leo_HTC_WWE_1.66.405.2_Radio_Signed_15.30.50.07U_2.06.51.07_Ship
still the same error :|
i also tried
RUU_Leo_HTC_WWE_1.48.405.2_Radio_Signed_15.28.50.07U_2.05.51.05_2_Ship
and
_HTC HD2_RUU_Leo_S_HTC_WWE_3.14.405.2_Radio_15.42.50.11U_2.15.50.14_LEO_S_Ship
all give me the same error :|

The Invalid Vendor ID error means that the rom you are trying to flash is not meant for your phone and the ones you are using are for a different vendor/operator/area than the one who supplied your phone. You either need to find the correct rom or else you need to install HSPL in order to flash any rom you wish.
You current spl is 1.42.0000 so trying to flash roms based on 3.14 will definitely not work as will most of the 1.66 based roms, as unless you use HSPL the rom needs to match the spl version on the device.
Try looking here and concentrate on the 1.48 or 1.43 roms
You can of course also try going to the HTC site for your area, entering your device S/N and try to download the rom for your device.

I just finished downloading and tried
RUU_Leo_HTC_WWE_1.43.405.1_Radio_Signed_15.26.50.07U_2.04.50_22_2_Ship
and
RUU_Leo_HTC_WWE_1.48.405.2_Radio_Signed_15.28.50.07U_2.05.51.05_2_Ship
...no luck..
i also went on HTC site..tried 4 different rom updates but when i enter my serial it says "Sorry, this software download is not suitable for your device" for all of them...
if its any help, it was like this because i remember doing something with using my SD card and taking a file and changing it to LEOIMG.nbh...

forget all that, and forget what i just sent you in PM.
you have spl 1.42.0000, so, get hspl2 (see lilnk in my sig) enter bootloader, run hspl2.exe (right click it, 'run as administrator')
choose, say, 1.66.hspl (it will automatically offer you 1.42.hspl, you can change it in the dropdown, or leave it as 1.42.hspl, it really doesnt matter)
when the phone restarts, quickly press and hold volume down, the phone will re-enter bootlader, flash a rom, any rom, over USB, so long as it isn't a 3.14 rom.
report back.

ah crap... I got everything working again after installing HSPL again before you posted...then i flashed a rom...and realized that HTC didn't fix my touchscreen problem so I have to send it in for repair...AGAIN. so I tried to remove HSPL AGAIN so I don't void the warranty...now i'm stuck at almost the same situation except it says SPL 3.03.0000
...and now i get a exclamation mark with a traingle but this time, under it, it says "Software update failed. Please try again."

ryennn said:
ah crap... I got everything working again after installing HSPL again before you posted...then i flashed a rom...and realized that HTC didn't fix my touchscreen problem so I have to send it in for repair...AGAIN. so I tried to remove HSPL AGAIN so I don't void the warranty...now i'm stuck at almost the same situation except it says SPL 3.03.0000
...and now i get a exclamation mark with a traingle but this time, under it, it says "Software update failed. Please try again."
Click to expand...
Click to collapse
well, that will be fine for warranty, because its a stock spl.
Basically, it sounds like what you just did was use hspl to flash the 3.14 rom from sd card, cos that lets the flash start, but it applies spl 3.03 which then checks teh rom and finds it doesn't match, and so fails. If hspl wasn''t there, it wouldn't let you get even that far.
So, you have spl 3.03 and no working rom.
You need your actual stock rom, not just 'a' stock rom, (im not scrolling to see if you posted it yet, but if its operator branded, you gotta get the right one) doesn't matter which version, 1.43, 1.66, 1.72, whatever. get that and flash it. USB should be fine, but if it fails go for leoimg on sd card.
Failing that, if you can get hold of another working winmo phone for afew minutes, you can probably revive it (and indeed flash teh 3.14 rom if you like) with a goldcard.
EDIT - oh, does your phone only work with one sim? if so, your first stop would be try teh branded one for that operator.

I think I'm just going to leave it if it's fine for warranty and call HTC to ask them if they can reset everything for me...i don't want to mess it up even more ]:

ahh well theres the unknown see, , cos in theory the only way you can GET that stock spl on your phone is if you have been playing with hspl (or maybe if you're an electronics engineer / 1337 mobile hacker, heh), , now if they want to be funny, perhaps they could call your bluff, , , no one has reported anything like that to my knowloedge, and it doesn't break any unauthorised software rules, so who knows.

i don't remember which one my stock rom was...i THINK its 1.66 but its not working... :\..
I bought this phone in China seperately without a contract so its unlocked/not branded.. its the T8585 model...

that's why you need to spend some time on the htc website, try to download roms using your serial, when it lets you have one, that will tell you your original stock.

When I enter my serial, they all say "Sorry, this software download is not suitable for your device"... \:

hehe, , then you are on the wrong htc region website. all the roms are there, somewhere.
could always phone htc and ask them which is the stock rom for your serial.

Nice, okay, the 1.66 that I downloaded from Middle East & Africa-English Country on HTC site worked after entering my serial...Now I have SPL 1.42.0000 .
Now I just gotta wait another 2-3 weeks before I get my phone back from HTC ]:
Thanks for the help! Appreciate it.

I cant beieve it, bricked phone?

Ever since I went to wp7 and back to android, my amazing hd2 has never been the same since. For weeks I have had freezing, so wanted to get a clean slate and start over. I did the following
Task29
Magldr 1.3
wanted to install nexushd2 so had to install
CWM_Recovery_for_NexusHD2_135M
it crashed towards the end of the install, ok I try to go back to magldr...but even tho I hold the button I dont get the options. I try it all again...same problem. I heard going back to stock 3.14 will fix most problems...it also hangs but at 8%?
Its now 6am and I need sleep...can anybody help...I really need a phone for tomorrow.
Thanks in advance
PS - Currently
PB81100 HX-BC
SPL-2.08.HSPL 8G EX
0X45
0X40
CotuallaHSPL
RUUNBH
Upgraed ROM code error, Please try again
Is that ok?

I got a quick question, did you reformat your SD card after you removed Windows Phone 7? If not this is probably your pro.lemons as WP7 cormates your card in a funky way so the phone tvinls the SD card is the enternal memory, I forget what it is called. But this is the same in WP7 native devices as they actually use SD card for memory and not enternal chips.
The best way to do this is to either vet an adapter and put your card in a digital camera and format it. Then reformat it again to Fat with your computer. Are you can just use your computer, but I suggest the digital camera as it will 100% remove the funky format.

Go into bootloader and flash a correct stock rom from USB. If it doesn't take confirm it's correct for your phone and try again.

sticking at 8% means a problem with installing the radio.
Put it in a plastic bag and pop it in the fridge for 30 minutes. remove and reflash.
I would recommend extracting the 3.14 installation file (using winrar).
Rename the RUU_signed.nbh to 'LEOIMG.nbh'.
Copy this file into the root of your SD Card, and pop the card in the phone.
Boot the phone whilst holding in the volume down button and let it flash.
If cooling the phone helped, send it back under warranty (you have got rid of HSPL, so all is good now.

I got mircosdhc to usb today, copied LEOIMG.NBH to sd, tried to flash but getting 28002 error not allowed
i then throws me back to spl 1.42
I have tried both 3.14 and 1.66 official roms...both sdflash and romupdateutility.
When I try sdflash with leoimg.nbg it gets to 1% then shuts down.
Is my hd2 dead? it doesnt even get orange led charge :-/
Tri colour screen now says
hx-bc
spl 1.42.0000 xe
micro (led) 0x05
microP(TOUCH) 0X40
Is that ok, I dont remember if being that

update
cant flash radios either, shows the progress bar then restarts.
I tried :
2.15.50.14
Gutted, its my best phone ever

hmm, quite a rash of stuck radios this past week or so, , hardware coming to the end of its flashable life?
@OP, some people are recommending (myself included it seems, by passing it on) chilling the phone in a sealed bag in fridge freezer, no sim no sd, then when its cool, put sd in and try to flash real quick, try a few times, keeping it sealed and cool.
Aparently the theory is that the hardware is overheating, and the cooling lets it work well enough for a little while.
There are one or two what look like success stories, it has to be said, but i wouldn't put a bet on it myself just yet.
Good luck.
(oh and i wouldnt put the phone in the bag in a warm room either, , take it outside for a while first, let it be cool before it goes in teh bag, less chance of condensation.)

It doesnt look good...either get a black screen with a triangle!
or if I get into the tri colour bootloader it says:
upgrade rom code error please try again
everytime i try flash a radio it goes either 0% or 8% reboots phone.
I wish I stayed on sd...never had any problems ever...ever since win7 my phone hasnt been the same.
Any more advice or links would be great, keep em coming. I dont want to give up on my hd2 just yet...Im mean its still (imo) one of the best android phones about

@ samsamuel
I cant flash via sd...keeps giving me
upgrade rom code error please try again
should i change my spl or something? its currently:
hx-bc
spl 1.42.0000 xe
micro (led) 0x05
microP(TOUCH) 0X40
do you know if that is ok?

this might be overstating an obvious that you've thought of, but are you sure you are using the correct stock ROM for your region? Have you tried flashing a custom ROM just to see what happens?

fracmo2000 said:
@ samsamuel
I cant flash via sd...keeps giving me
upgrade rom code error please try again
should i change my spl or something? its currently:
hx-bc
spl 1.42.0000 xe
micro (led) 0x05
microP(TOUCH) 0X40
do you know if that is ok?
Click to expand...
Click to collapse
flash back to hspl 3 and try again,if no succes ur bootloader is damaged and that will be problem

fracmo2000 said:
@ samsamuel
I cant flash via sd...keeps giving me
upgrade rom code error please try again
should i change my spl or something? its currently:
hx-bc
spl 1.42.0000 xe
micro (led) 0x05
microP(TOUCH) 0X40
do you know if that is ok?
Click to expand...
Click to collapse
that would be a stock spl then,, and with the rom update error, that means you have flashed the wrong stock rom from sd card. It has removed hspl, then the flash failed because you had (have) stock 1.42.0000 spl.
enter bootloader - usb - hspl4 - 2.08.hspl HSPL not 0000 - into bootloader again, has the spl changed? if not, then flashing is stuck, and you are in the stuck radio situation, if it HAS changed, now try flashing a rom or radio, , , flash from usb, see what happens.

orangekid said:
this might be overstating an obvious that you've thought of, but are you sure you are using the correct stock ROM for your region? Have you tried flashing a custom ROM just to see what happens?
Click to expand...
Click to collapse
not at all, keep me coming...I honestly dont see any other phone just now that I want (in the uk at least)...maybe the artrix but thats not for a few months...so need to get this baby back working!
I tried both 1.66 and 3.14 wwe (i couldnt see a uk one...
_HTC HD2_RUU_Leo_HTC_WWE_1.66.405.2_Radio_Signed_15.30.50.07U_2.06.51.07_Ship
RUU_Leo_S_HTC_WWE_3.14.405.2_Radio_15.42.50.11U_2.15.50.14_LEO_S_Ship
Are they ok?

You could go to HTC's website, and search for HD2, and then go to downloads, and try downloading the newest rom that the site offers. You need to enter your serial number which is located under the battery. With some luck you will end up having a shipped rom, which has the same cid as your phone, and you will then be able to flash your phone via usb cable (from the tricolor screen).
If for some reason the HTC website won't accept your srial number, try to select another country from the top right part of the website.
I live in Serbia, and the Serbian HTC page has no rom downloads for HD2, the International page won't accept my serial, but the polish page did accept it. So keep trying, until the webpage accepts your sn.
If you are in no luck, you could try downloading roms from http://www.shipped-roms.com/.
Hope you will succeed in your quest to resurrect your phone.
Best of luck
d3m0n

d3m0n1 said:
You could go to HTC's website, and search for HD2, and then go to downloads, and try downloading the newest rom that the site offers. You need to enter your serial number which is located under the battery. With some luck you will end up having a shipped rom, which has the same cid as your phone, and you will then be able to flash your phone via usb cable (from the tricolor screen).
If for some reason the HTC website won't accept your srial number, try to select another country from the top right part of the website.
I live in Serbia, and the Serbian HTC page has no rom downloads for HD2, the International page won't accept my serial, but the polish page did accept it. So keep trying, until the webpage accepts your sn.
If you are in no luck, you could try downloading roms from http://www.shipped-roms.com/.
Hope you will succeed in your quest to resurrect your phone.
Best of luck
d3m0n
Click to expand...
Click to collapse
Ha, funny you should say mention that about HTCs site...but my S/N didnt work either. I wasnt sure if it was something to do with me/my phone or just the site was rubbish!
Im currently downloading an o2 rom frmo shippedroms (great site, thanks) so all my fingers and toes are crossed.
Funny thing is, I can flash hspl and hspl2, I managed to flash radio but not rom...keeps rebooting.

Did u take out sim and SD and try flashing?

@samsamuel
Well, I managed to get hspl4 on ok (2.08hspl) and then flashed a win6.5 rom it worked...but doesnt boot (stuck at flash screen)
When I downloaded official roms from both htc and shippedroms...they are corrupt. I used winrar, 7zip and tried to just run the packaged exe file...doesnt open.
Can anybody help me test these files and see if its me or have a good office rom they can upload?
@milli
when i managed to get an win6.5 rom flashed, sd was in, sim was out (i used hspl usb flash method)
EDIT - Found some o2 shipped roms on xda...extracted and going to try usb flash via hspl4

well i can flash radios and roms via hspl4 usb flash method AND usb via pc...but still cannot boot. Stuck at inital splash screen.
Any ideas now? We have made progress
edit - i have tried both custom roms and shipped o2 (uk) roms

Did you try hard reset after you'd flashed the rom(s)??

tried it once or twice, but not everytime. redownloading another rom
RUU_Le2_UK_1.43.206.4_Radio_Signed_15.26.50.07U_2.04.50.22_2_Ship_WORKING.exe (191,374 KB)
i hope this works...im getting desperate. Im still unsure at whats went wrong. Is it something wrong with my nand memory?
I can now flash radio, roms but yet cannot boot (Stuck at white htc splash...the red text sometimes appears...sometimes it doesnt).
edit - that rom failed to flash

[Q] htc hd2 is not starting after flashing

Dear expert,
I bought my htc hd2 in saudi Arabia. I had reset this phone by mistake by clicking on value added button and after that a language prob appeared. Anyways one of my friends flashed my phone with new english language rom for ease and install anderiod as well but the only issue was, when i was using internet, it was getting heat and resetart itself.
So I thought that it might be a problem of anderiod with windows, what i did was, i remove and formated the sd card first on my pc then inserted into my phone and flash it with the same rom, but after that my phone doesn't boot fully upto home screen. It does go to the boot option where we get the different strips of color like red green blue and white with some info on the screen like (note: I don't know what these were originally but now all these info are what depicted belwo)
PB81100 SS-BC, SPC-2.08.HSPL 8G XE, 0X05, CotullaHSPL 05X0 and USB
but doesn't start fully after reseting, always freez at the white screen with htc and nothing else:-(
Till now I tried different forum tips for the help, flashed many times with different rom but still the same prob, doesn't completely start upto home screen, always freezed as mention above.
Please help me, what should I do, so that my phone become as it was originally?
Which version of rom or some other software i should download and try to flash it and from where i should download the correct one.
Some of the infos of my phone are as follows,
htc hd2
SN: SH06PNW02764

Firstly, remove your serial number.
Now, if you want your device "as originally as it was" you need to download HSPL Package and remove HSPL 2.08 from your phone.
By the way, what radio are you using?

Is that a US T-Mobile version or another Vendor version !? as your serial number does not pull up a ROM selection on HTC's website !
With device correctly identified we can probably find a ROM & try flash via SD might be good option should you want HSPL ect all removed in one flashing step
Problem does sound more like quite common mainboard fault experienced by quite a few users of multiboot HD2s, but lets hope not ....

[Q] My HD2 Tmous is currently stuck at 10% in re-stocking ROM

I just got HD2 Tmous from ebay for parts to fix another that I sliced and cut the LCD flex cable. The phone is in great condition and after I put in the battery from my old phone it booted up and stuck on stick together screen. I booted up to the bootloader tri-color screen and it displayed the following:
PB8112 HX-B3
SPL-2.08.HSPL 8G XE
0x05
CotullaHSPL 0x05
After I used the USB cable to connect to my PC running Windows 7, the Serial at the bottom changed to USB. I downloaded Windows Mobile Device Center 6.1 and installed and run it. The WMDC said USB not connected. I found the thread "Stuck on Stick Together Screen" with similar problem and was solved by re-stocking the ROM from Tmous. I downloaded it but renaming from exe to zip did not work in order to extract the LEOIMG.nbh. I found another thread "[TUT] Flash your ROM / Radio via microSD" and downloaded it. I copied the ROM to my FAT32 1GB SD card, inserted it in the phoned, booted it into the bootloader, and flashed it. It is now stuck at 10% for more than an hour.
LEOIMG.nbh
RADIO_V2 -
RCUST -
BOOTLOADER -
SPLASH1 -
OS
CONFIGDATA. -
Update in Progress...
(progress bar stuck at about 10%)
I forgot to verify that the ROM is for HD2 Tmous and don't know what it is - the thread did not mention it.
What should I do now?
Thanks in advance.

The part, where you stuck at 10% is the part, where it flashes the Radio Image. I stuck at it, when i choose the wrong ROM. Do you know, which ROM was the original one for your phone? Look it up on the internet and try it with it.
I saw, you wanted to extract the .NBH file. Try it with the Software "WinRAR". When you installed it, go to your RUU-Extractor file, right-click it and choose the point "Open in Winrar..." or sth like that.
I hope, that was a little help

Thanks,
I got it from ebay so i don't know its history. After more than 3 hours stuck at 10% and found out from other thread the ROM from Tmous was not a normal zip file that can be viewed directly from Windows Explorer, I used WinRar to extract the NBH file and pulled the battery out and put back in. The phone was rebooted and got the triangle failure symbol; I pulled the battery out and put back in and booted into the bootloader - it displayed these additional info: RUUNBH at top right and Upgrade ROM code error Please try again at the center. Also, the serial did not change to USB anymore.
(omitted some steps) I flashed the leoimg.nbh file downloaded from Tmous and the same problem happened.
Since ActiveSync does not connect to the phone and the bootloader does not function properly, any utility required ActiveSync and flashing with properly function bootloader will not work. I think there is no way for me to flash the Radio ROM, right? Is there any utility or mode that will tell me which version of Radio currently in the phone?
I am thinking of trying to flash the same HSPL and MAGLDR and see what happens after reading some more threads.

(omitted some steps) I flashed the leoimg.nbh
Click to expand...
Click to collapse
so it doesnt say 'fail' next to anything on the blue writing/grey background screen when you flash from sd card? like next to RADIO_V2 -? because it sounds like a pretty standard stuck radio (or stuck spl, tell me, did teh spl line change from your first post? (("(omitted some steps)" dont ommit anything, full detail is the only way to get accurate answers.))
Mostly this never gets fixed without a jtag, but sometimes trying all teh various roms for that particular phone (you sure its a tmous? if it is, DO NOT flash anything you didn't get from the tmous/htc website,,, if it doesnt work and you get frustrated after 100 attempts, and its late at night, dont think "oh ill just try a non tmous one, just to see" cos it will die.)
Things to read up on and try are the freezer trick, chill the phone for a while, then quickly try an sd flash (forget about usb flashing, if you are gonna fix it, its most likely sd that will do it),, trying various tmous stock roms (if you go in the tmous stock roms thread, DO NOT flash the first one in the list, , its not a real tmous rom and will brick you,, teh second and third would also be best avoided, with the manufacturing spl's, because going back to normal stock is tricky, , not impossible, but a pain none the less),, also have a play with hspl3 or 4, see if you can change the spl, because sometimes its the spl thats stuck, and not the radio (however sticking at 10% and not seeing anything next to RADIO_V2 - makes it almost certainly the radio,)

Nothing - no additional info besides the progress bar stuck at 10% described in 1st post and the SPL line did not change. I think the phone now has the exact info except there is nothing where serial was displayed before (yellow text info on red background) as my first post.
Omitted some steps: these are just steps to copy the ROM downloaded from Tmous website to the sd card for flashing (T-Mobile_HD2_MR_software_3.14.531.1.exe).
Yes, it's a Tmous. The void sticker is still there and the touch screen has the T-Mobile logo.
I knew that I had to flash Tmous ROM because HD2 Tmous has 1GB of ROM instead of the normal 512MB.
Unfortunately, most of shipped ROM links are broken. I wanted to try the 2.10.x.
Thank you for your help.

[Q]stuck at recovery; serial change to usb

Hi everyone!
I am very sorry for such a n00b-post, but I really cannot find a solution.
The problem:
I recently got a HD2 of a friends who did not use it anymore, because Android suddently stopped working. Now it's stuck at a black screen [A] saying:
aMAGLDR V1.13
Build: Feb 1 2011 03:46:07
by Cotulla 2011
I tried resetting the phone using the red button near the battery, but it did not solve the problem. I am able to boot the HD2 into recovery-mode (colory screen) but then, after connecting to a pc it does not change from "serial" to "usb".
I have installed WMDC on my W7 64-bit system. I have also tried to use "RUU_Leo_HTC_NLD_1.66.404.1_Radio_Signed_15.30.50.07U_2.06.51.07_Ship" (from the 4shared "shipped LEO roms"), but none of them recognises my HD2 neither in Recovery nor in the black screen [A].
Is this phone useless? What can I try to revive it?
What might be helpfull: when normally booting, the phone vibrates once during the HTC-screen and 5 times after the black screen [A] appears.

andrejazzz said:
The problem:
Android suddently stopped working. Now it's stuck at a black screen [A] saying:
aMAGLDR V1.13
Build: Feb 1 2011 03:46:07
by Cotulla 2011
I am able to boot the HD2 into recovery-mode (colory screen) but then, after connecting to a pc it does not change from "serial" to "usb".
I have installed WMDC on my W7 64-bit system. I have also tried to use "RUU_Leo_HTC_NLD_1.66.404.1_Radio_Signed_15.30.50.07U_2.06.51.07_Ship" (from the 4shared "shipped LEO roms"), but none of them recognises my HD2 neither in Recovery nor in the black screen [A].
What might be helpfull: when normally booting, the phone vibrates once during the HTC-screen and 5 times after the black screen [A] appears.
Click to expand...
Click to collapse
Since you're unable to connect to PC, then you can't re-flash HSPL.
HSPL needed to force flash any shipped WM6.5 ROMs to HD2.
Then the only way is to flash original WM6.5 ROM for your device from uSD.
If you're not sure what CID, just download any HD2 shipped ROMs and try to flash from uSD.
Just be careful not to flash EU's ROM on T-Mobile device!
Extract the ".exe" file, then rename the ".nbh" file into "leo.nbh", copy that to root of uSD.
Power up your device while pressing vol down button.
Don't worry if the ROM refuse to flash, it's just a wrong CID.
But to make sure, connect your device to another clean PC (without android drivers inside, just WMDC), preferably a PC sets for syncing WP7/WP8 devices.
And make sure your device turns on by itself when charger is connected (auto turn on from off state).
That's just to make sure that usb connector is not damaged.
HD2 vibrate 1x at power on, it's normal.
Vibrate 5x after magldr shows up, I suspect something wrong with magldr or the ROM itself (corrupted or something).
Another possibility is some NAND bad blocks.
But if it's vibrate 5x at power on, then you have a bad luck.
The point is, flash the original ROM first.
If it's success, then flash HSPL.
After that, the rest is up to you..

Firstly, I want to thank you very much for your quick and extensive answer!
But I have only one tiny question: are these the ROMS which I can find at http: //www . 4shared . com/dir/22189940/b8552fa0/Shipped_Leo_ROMs.html#dir=MGRa1Cen ? And you mean I should just pick one and try?

You can also find HD2 shipped ROMs here.
Anything that has "TMO" are T-mobile ROMs, otherwise it's EU.
Again, don't flash EU's ROM on TMO devices!
The first 3 digit are the ROM version (1.66, 1.48. etc.), 3.14 is the latest WM6.5 ROM.
The next 3 digit are CID code (207, 404, 707, etc.).
Like I've said, if you don't know which CID for your HD2, then just download all ROMs from different CID then flash it one-by-one using uSD.

Thanks!
So far I have tried the 404 and 162 (edit: and 161, 911), but so far without luck. I'll keep you posted!
Tiny question: is it normal that I cannot shutdown in Recovery Mode?
Perhaps some useful info shown in Recovery:
PB81100 HX-BC
SPL-2.08.HSPL 8G XE
0x05
CotullaHSPL 0x40

Correct me if I'm wrong, but it looks like an EU HD2, TMO HD2 are rarely using hynix nand, made around late 2009 or early 2010.
Just try to flash ROM with CID for your friend's country first.
If failed, then try another CID.
There should be one or two info about CID number vs. country somewhere around.
Good luck!
Sent from my Windead Phone 7 using xda app-developers app

At this moment I have tried all the NLD roms with no result. Also I have tried roms from several european countries, but none of them works:/ Might it help if I give the serial number?
And what might be worth saying: my phone turns on when connected to AC power / wall-charger; when connected to charger the "serial" disappears...
Thanks for all your help!!!

Have you try connect to other PC?
When flasing ROM from uSD and failed, what error message you got?
If it's "CID mismatch" or something like that, than it's definitely a wrong CID.
If it's "ROM update error bla bla bla", it's most likely corrupted flash image or the uSD itself (use a small sized uSD, 1gb would be fine).
Even if you flash the correct CID, without removing HSPL first, it would still throw an error message "ROM update error bla bla bla" during flashing Radio.
Then it will restart and retry to flash again on it's own.
By the way, I don't know if there are ways to flash HSPL from uSD.
Or guide on how to make a "gold card".
I sugest you search it.
Worth to try if you couldn't find the correct CID for your device.
CID from serial number?
Yes, back in 2010/11 HTC site provides s/n checking for download the correct ROM.
But now it's gone.
Sent from my Windead Phone 7 using xda app-developers app

Thank you very, very much for helping such a newbie ^^
At this moment, I am able to get into the update-menu: I changed the filename to LEOIMG.nbh. The only problem is that all the Dutch images give the same error: 00018003 : Radio (V2) - FAIL.
What could I do to solve this error? Use the freezer-trick or wouldn't it make any sense?
edit: it does boot when I connect to another W7 pc with WMDC (replies " Not connected" ), only it automatically starts the update-procedure (which fails).

There are no such thing as newbie, that's why we need to learn.
Error 00018003 during Radio flash?
I have no idea what error is that.
But first, are you sure that your friend bought the phone on local shop?
I mean, not imported, or when he/she travel overseas, or has the mainboard swapped at HTC service center.
It happens to me when my second HD2 suddenly has no signal, about 2 years ago.
Brought it to local service center and they swapped the mainboard without telling me.
And the swapped mainboard has CID from 404 (europe), the original was 707 (indonesia).
Okay, back to error something.
WMDC won't recognize the phone unless it's a working WM6.5 device, or a working WP7 device with WP7 SDK + Zune installed on your PC.
Just put the phone into bootloader screen (3 color screen), then connect it to a clean PC.
Does the "Serial" changed to "USB"..?
If it does, reflash HSPL 2.08 using HSPL4 package.
Then flash Radio ROM only, 2.15.50.14 is a good one.
Again, an EU HD2 can use either EU's Radio ROM or T-Mobile's Radio ROM.
But a T-Mobile HD2 can only use a T-Mobile's ROM..!
If the "Serial" doesn't change to "USB" but on your PC makes sound like something is plugged in, open device manager and look for an unknown device (no drivers loaded).
Expand it, what does it says?

To be honest: I am not 100% sure that it is an European (Dutch) phone. What I saw when I opened the phone's back was that the warranty-seals on the screws were molested. I don't think he got the motherboard replaced: way to expensive in relation to a new phone...
The bootloader screen gives now the following text:
RUUNBH
PB81100 HX-BC
SPL-2.08.HSPL 8G XE
0X05
CotullaHSPL 0x40
Upgrade ROM error
Please try again
When I connected it to a clean pc, the phone booted and gave another upgrade-error, only this time on a black screen (I got the uSD out the phone).
After booting the phone and connecting to a pc the "serial" does not change to "usb"...
When I tried to install WMDC I get the error "Installationpackage not supported by processor". Seems like bullcrap, but there it ends. No yellow exclamation marks in Device Manager...
I have yet not tried to flash a T-Mobile ROM to the phone. I have tried all the NLD ROM's: 1.66.404 ; 1.48.404 ; 1.66.404 ; 3.14.404 ; 1.66.404 ; 1.43.404
I have yet not tried the other ROMs I downloaded, but I will tomorrow. To start 161 does not work.
Also: I cannot shutdown when in bootloader or MAGDLr, is that correct?

What colour are your call & end key buttons !
if white you have standard EU type model. T-Mobile EU models are same as any EU model & can flash any ROM/Radio
If green & red you have a T-Mobile USA model (TMOUS) & need correct ROM (found in HD2 Wiki)
T-Mobile USA model needs care as if flash wrong radio version you can brick it.
Flashing via SD card should be last choice as first stage of a SD card flash is install of the SPL to standard SPL from the nbh which means you have no CID bypass as HSPL gone.
ideally you need a Windows 7 32bit machine with a known working WMDC setup & try flashing a suitable rom once decided on EU or TMOUS device.
As you have HSPL on your HD2 already it will bypass CID if flash via PC so you can flash any CID code rom.
Try connecting device to PC (with known good WMDC) and use reset button on HD2 to boot to bootloader & see if get any luck in running ROM installer from PC.
If lucky the USB flash issue is PC & drivers rather than hardware on HD2.
I would suspect you have nand issues on HD2 or perhaps worse, if nand sometimes you can get it back if persistent & get something to flash completely.

Thanks MisterB for adds up.
So am I, suspected a nand issue.
The reason I want him to revert back to original SPL & Radio is to make sure that it's a nand related problems, not radio hardware problems.
If he managed to find the correct CID for his phone, he could easily reverts back in case somethings wrong in the future after playing with custom ROMs.
This also happens to my friend's phone a couple months ago.
But in her case, the bad blocks are definitely located where magldr resides, and many more on data partition.
She can flash shipped ROMs completely, but it refuses to boot.
Can't flash a WP7 ROM because magldr freezes when it's loading, can't even bring the menu screen.
She can run a native sd android build for a couple weeks, but then it acting strange again.
Then finally she just gave up and bought another phone.
@andrejazzz:
You can't shutdown on bootloader (3 color) screen.
Remove the battery is the only way to shutdown, or press the reset button to restart.
But you can shutdown/restart or anything else on magldr menu screen.
Press & hold power key right when magldr loads up (before it's start to "go go go").
In addition, you can download WMDC x86 version here, and x64 version here..

He may indeed need try SD flash but I would exhaust all options of USB cable flash via PC first as retaining HSPL will be useful to start with as any generic HTC ROM could be used for the USB cable flash.
If that is not possible then flashing via SD is only viable option & indeed many times only way get over bad boot/nand issues but with all the CID versions for HTC regions & operator branded regions you have a hard job knowing the right one, you could even try the right ROM & as it does not flash overlook it for further testing.
I see he has tried SD flashing but still has HSPL so either SD card is not best suited for nbh flashing or nand/hardware that bad even first stage of flash is not possible.
If I was testing this device & trying recovery I would probably try freezer test to cool device prior flashing & make good effort on USB flash before going on to SD card.
Most well used Android HD2s these days have nand or bga issues to some degree as android works the hardware so much harder than WM6.5.
You really need be sure PC & driver are known good for flashing & if going to SD flashing that SD card is suitable or you will waste a lot of time & effort.
Loads of links & tips for all the software & some threads are in the HD2 Wiki

I apologize for replying so late, but I have had no time: I had a few tests at school
@Mister B: I have a black HD2 with white icons, so I have a european model.
I have installed installed the X86 on a clean 32-bit system, but it does not recognize the phone. I have reinstalled the WMDC on my W7 64-bit system, but still it does not recognize the hd2. I have no other Windows Phones, so I am not able to verify the WMDC-installations.
When I connect to a pc, the phone boots and shows: "Software update failed! Please try again"
@Shadow_Nexus: Correct, that is exactly what happens. I do not completely understand what you mean with "Press & hold power key right when magldr loads up (before it's start to "go go go")", could you please explain?
@Mister B: How could I check if the SD-card might be the problem? It is a 16GB Class 4 Kingston SD. I have tried all the NLD-roms and other versions (random countries, not TMOUS). I have tried the freezer trick with a NLD-rom on a mSD, but it did not work.
Thanks for all your help!

Best using a 2gb or 4gb (8gb max) card for nbh flashing & do a proper fat32 format with something like hp format tool before using it.
link below may help:
http://forum.xda-developers.com/showthread.php?t=681317

Again, thank you very much for your reply. But: do you have any clue what ROM's I should try? I am asking this, because I have already tried all the NLD ROM's I found on the site @Shadow_Nexus gave in post #4, but every one of them returns the same error. Should I switch to another country and try, for example, all German ROM's?

I got my hands on another HD2 and when I connect that one to my pc it show up, named "HTC Sync". The bricked one still does not respond:/ Should I retry all the non-TMO roms I can find?
Edit: My brother "helped" me out and sold the phone...