Galaxy Nexus Works without the Screen but does not Boot Initially - Hardware Hacking General

I am using a Galaxy Nexus phone to control my robot. I needed to remove the touch screen and only use the guts of the phone. The bad news is that i had to keep the screen connected for the processor to boot up initially. The good news is that after it is boot up i can remove the screen and everything is operational. I wish there was a way to bypass the initial check of the screen so that i could remove it permanently.

Albert006 said:
I am using a Galaxy Nexus phone to control my robot. I needed to remove the touch screen and only use the guts of the phone. The bad news is that i had to keep the screen connected for the processor to boot up initially. The good news is that after it is boot up i can remove the screen and everything is operational. I wish there was a way to bypass the initial check of the screen so that i could remove it permanently.
Click to expand...
Click to collapse
There are quite a few threads here which discuss usb-uart.
If you can find the internal uart that might also be helpful for your project.
Here is one conversation.
Here is a guide I made on usb-uart.

Related

Screen turning itself off when I slide it in

Hey guys, I jsu bought a used G1, since I needed a phone because I've started developing apps for android. Anyhow, since I don't have much money I had to buy a used one.
So this one has a (quite big) problem - when the screen is on the keyboard (normal position) the screen turns off. You can see the backlight, but nothing else. When the screen is slid out, it works perfectly fine.
Any idea what the problem may be?
Sent from my HTC Dream using XDA App
It can be a problem with the ROM also can be a hardware problem.. Try another ROM first and report back.
I tried more than 3 roms, still does the same.
I also filmed how it turns itself off:
http://dl.dropbox.com/u/5608529/vidya/g1.avi
Forgive me for stating the obvious, but have you tried wiping?
Yup, more than once.
At this point, if it was my phone, I'd consider breaking out a screwdriver set and try to see if something came loose or is worn.
Well now it's not working at all.
Not even when the screen is slid out.
And I don't have the required screws to open it... Guess I'll have to buy them somewhere :/
EDIT:
This is weird.. I somehow managed to turn it on, but now it's stuck on a black screen with "Build: " at the bottom of it...
EDIT2:
And now when I rebooted it, only the backlight turns on...
EDIT3:
When I turn it on regularly, the T-Mobile G1 screen appears and then disappears. You can still see the backlight, but nothing else happens.
When I turn it on to recovery mode, the G1 screen appears, then disppaears and then you can see a black screen with "Build: " at the bottom.
EDIT4:
Apparently, when I start it regularly, it does boot into Android, but it's like stuck.. Seems like it's kinda bricked? No idea.
EDIT5:
Is it possible to reinstall the ROM without having access to the recovery menu?
Crembo said:
Well now it's not working at all.
Not even when the screen is slid out.
And I don't have the required screws to open it... Guess I'll have to buy them somewhere :/
EDIT:
This is weird.. I somehow managed to turn it on, but now it's stuck on a black screen with "Build: " at the bottom of it...
EDIT2:
And now when I rebooted it, only the backlight turns on...
EDIT3:
When I turn it on regularly, the T-Mobile G1 screen appears and then disappears. You can still see the backlight, but nothing else happens.
When I turn it on to recovery mode, the G1 screen appears, then disppaears and then you can see a black screen with "Build: " at the bottom.
EDIT4:
Apparently, when I start it regularly, it does boot into Android, but it's like stuck.. Seems like it's kinda bricked? No idea.
EDIT5:
Is it possible to reinstall the ROM without having access to the recovery menu?
Click to expand...
Click to collapse
Getting a set of screwdrivers/torx/etc is a good idea. I picked mine up on eBay awhile back. An investment every techy guy should make.
It also sounds like you may want to get acquainted with adb and particularly fastboot. You *should* be able to use fastboot to get a working recovery and then use the recovery to get a rom loaded. This: http://forum.xda-developers.com/showthread.php?t=532719 seems like a decent guide to get you going with what you need if it is in fact a software issue.
Since your experience keeps deteriorating, I'm beginning to wonder if a chip inside is going bad - especially with the odd things like "Build: " showing up. (Let's hope this is not the case!) Nevertheless, I think I'd start with fastboot and go from there. Good luck.
Thanks a lot, ill try it as soon as I get home.
Sent from my FROYO X using XDA App
EDIT1:
What the hell? All I did was delete the recovery (didn't even install a new one, kept on saying it's missing the file, even though I did move it using adb push) and now suddenly Android works normally.
EDIT2:
Well now it's stuck again, just like before deleting the recovery...
I'll try to reflash the recovery and then see what happens.

Samsung Galaxy S3 - Touch Screen Not Working

Hi
Yesterday, I broke my samsung galaxy s3 screen
Now all i get is a black screen. And with no way to access anything that is on the itnernal memory on my phone.
When I plug my phone, I usually have to bring down the menu bar, and click the mount option. However, as the phones touch screen doesnt work, and the screen is just black, I dont know how to back up my data.
Does anyone know if there is anyway of backing up my phone?
Thanks
saadra said:
Hi
Yesterday, I broke my samsung galaxy s3 screen
Now all i get is a black screen. And with no way to access anything that is on the itnernal memory on my phone.
When I plug my phone, I usually have to bring down the menu bar, and click the mount option. However, as the phones touch screen doesnt work, and the screen is just black, I dont know how to back up my data.
Does anyone know if there is anyway of backing up my phone?
Thanks
Click to expand...
Click to collapse
You could try to use Kies to backup some data i guess.
Wrong section, post in QA
I think someone had posted a guide to navigating your directory blind. Have no idea where it is, but do some googling, it should pop up! Good luck.. and as mentioned please try to post future questions in Q&A!
<sent from my quad-core S3>
Just plug in to computer and save files from internal memory. If you want to do a backup, boot into recovery and then use volume buttons. Can't remember the sequence. Just Google image a screen shots of CWM.

[Q] Is it possible to retrieve files from N7 whilst dead/bricked?

Hi all
Apologies at coming on here and immediately asking for help, but....
I've had my Nexus 7 since July and have been very happy until NOW!
I seem to have been cursed with the dreaded flat battery resulting in n7 being stuck in the boot up.
I get as far as the Google and X icon but then stalls.
I've tried all the methods of long push of buttons/multiple buttons/etc but to no avail.
I can bring up the factory restore option so I know I can get it working again, but....
I have an exam in a week which foolishly had work stored for on my n7 without back up (yes fool) so....
Please is there anyway to retrieve my files via PC etc before factory resetting
All help genuinely appreciated
Mark
rooted vs unrooted (or unlocked bootloader even if not rooted) makes a huge difference in the answer.
Please state which.
Sorry about that
Not rooted.
It is absolute stock, nothing changed or added from purchase other than jellybean updates
Thanks Mark
pleading said:
Sorry about that
It is absolute stock, nothing changed or added from purchase other than jellybean updates
Thanks Mark
Click to expand...
Click to collapse
I believe you are SOL in that case. Sorry.
Find someone with a Nexus 7, pop the back cover off and use their battery to boot up and retrieve your files. The back cover just pops off.
Sent from my Nexus 7 using xda app-developers app
bigbop said:
Find someone with a Nexus 7, pop the back cover off and use their battery to boot up and retrieve your files. The back cover just pops off.
Click to expand...
Click to collapse
pleading mentions the battery, but then says "stalls" - not "shuts down", which is what you might expect if the battery was drained:
pleading said:
I seem to have been cursed with the dreaded flat battery resulting in n7 being stuck in the boot up.
I get as far as the Google and X icon but then stalls.
Click to expand...
Click to collapse
But, bigbop could be correct if pleading meant "low battery shutdown"
One other very long shot - assuming that that the device is hung - is to see if either adb or MTP are available. Normally that happens very late in the boot & I have to imagine that he has already tried that though.
Hi again guys
Firstly thanks for not giving up on my situation!
Bad explanation by me I guess....
The battery went flat/dead (my bad)
Plugged in to charge and screen lit up again but showing the 'powering off' script
Left over night on charge, wouldn't switch on again next morning
Left on charge all day still no joy but if I try switching on whilst plugged in I first get the Google name, then the Google X but then gets 'hung' (probably a better description than freezes etc as it still pulsates the colours)
Only way to get out of this is to keep power button pressed which switches n7 off and starts the cycle again
If during the recycle I keep the volume down pressed then it accesses the option screen to recover/reboot etc
Hope this helps, and again thanks (desperate to recover course work)
Mark
Hi again
Update...
Battery is showing full now
But still same 'hung' situation
Regarding the 'ADB'
I can get to the 'apply update from ADB' option
And if I choose it states.... 'now send the package you want to apply to the device with "adb sideload <filename>"'
As always thanks for any help or suggestions
Mark
Mark,
It sounds to me like what you are describing is ADB in the stock recovery, not a ADB when the regular operating system is running. (Is that right?)
Unfortunately, the stock recovery is only good for 2 things: applying an OTA update, and doing a factory reset. Even if your tablet needed an OTA update (and it probably doesn't if it is up to date), it probably wouldn't fix the looping/wedged phenomenon: usually that is caused by stuff in the userdata partition.
Doing the stock recovery factory reset might cure the wedged/looping problem - but only if it wipes all the data from your tablet. (Including the /sdcard area too).
The only hope I held out was if your tablet was reachable via a ADB or MTP with the wedged operating system sitting there looping. Usually those facilities start up quite late in the boot sequence, however so probably you don't have that.
Sorry. I think you are still SOL when it come to retrieving files.
Thanks for the help anyway
I'm guessing that with no further responses that really is the end for my work.
Unfortunately for me personally it will mean the end off my relationship with the N7, as much as I've loved it I really can't justify the obviously common occurrence of this happening.
Thanks again all
pleading said:
Thanks for the help anyway
I'm guessing that with no further responses that really is the end for my work.
Unfortunately for me personally it will mean the end off my relationship with the N7, as much as I've loved it I really can't justify the obviously common occurrence of this happening.
Thanks again all
Click to expand...
Click to collapse
I had same sort of problem N7 went flat tried to charge but would not power on
Took back panel off and disconnected battery for 10 mins reconnected battery and put back on charge
it then booted up as normal
pleading said:
Thanks for the help anyway
I'm guessing that with no further responses that really is the end for my work.
Unfortunately for me personally it will mean the end off my relationship with the N7, as much as I've loved it I really can't justify the obviously common occurrence of this happening.
Thanks again all
Click to expand...
Click to collapse
Uhhh ... what?
The OP was about a tablet that you couldn't get into because
[a] it had a correctable soft-fault
you didn't want to exercise an available soft-fault recovery method because of a desire to reclaim user files not backed up
... and so far as we know the soft-fault recovery mechanism still is available to you.
How did that morph into "this is the end"?
You need to re-do your homework, perform a factory reset, and move on with your life.
You have used either software or hardware in the past haven't you? That thing isn't a toaster or a waffle-iron! No backups of important stuff? Come on!
OK, well then. Pack it up and send it to me with the charger and I'll pay for the shipping - UPS ground.
Doesn't the Nexus have a safe-boot mode?
Sent from my Nexus 7 using xda app-developers app
bigbop said:
Doesn't the Nexus have a safe-boot mode?
Click to expand...
Click to collapse
Just tried right now - held the Vol-down button down continuously from about 2 secs after the Google B&W splash screen appeared until the lock screen appeared. That worked. (Stock 4.2.2)
"Safe mode" appears in the lower left corner. I had access to all the market apps (that I tried), but did not see a toast notification from StickMount after the boot - suggesting that safe mode only inhibits apps from starting on boot.
I suppose this could work (although the OP's deadline has probably come and gone) for bypassing a hung boot - but only if the hang is due to a market app that normally starts on boot.

Dropped S5 - screen is black, sound and home button still works

So, like the title says, I dropped my S5 today. I have a case on it, so it wasn't a direct hit, but nonetheless, the screen isn't coming on now. There are no cracks or visible damage on the outside and there is still sound. The LED still works, the home button is still functional, the capacitive buttons still work, it's just the screen. I realize that the easiest thing to do would be to send the phone into T-mobile and get a replacement, but I need a way of backing up the app data. Would you guys know of any solutions?
I am trying to pull a backup image, but I am not even know if the process I am using will even work for me or if I can restore the image afterwards.
http://forum.xda-developers.com/showthread.php?t=1818321
The phone is rooted. I am pretty sure USB Debugging is enabled. Is there a way I can get into my phone and pull off the app data? I ideally want to make a nandroid backup and then flash the replacement phone in twrp.
**EDIT** - found a guide that used "adb shell twrp backup SDBOM" as a method. Would it work in my case for what I need? What I mostly care about is my app data and messages. I am not too great with the adb commands as I have never really had the need to use them, but from what I have read I should be able to accomplish everything I need to do. I should mention that I can get into recovery using Android Tools
****EDIT**** - I figured it out. I used this tool to access my phone.
Hi,
Try taking battery off.
Press power button for a minute.
Then put battery after 5 to 10 min.
Now try to power on.
See if anything comes on screen.
for me it works.
Good luck.
Sent from my Nexus 5 using XDA-Developers mobile app

Samsung s5 black screen

Question 1. This just happened right now my s5 is starting up and sometimes it shows the s5 startup powered by android sometimes not after that it proceeds in starting up with the usual sound effects but the problem is the screen is just plain black. Now i believe my phone is proceeding to the homescreen cause i tried to ring it and it did plus my ringtone music played. I tried pulling the battery multiple times and start the phone but still same result. I also tried the taking the battery off and pressing the power button for a minute. also tried the safe mode, but none of them worked. What do you think? is it a firmware or a hardware issue?
Question 2. Im still not sure the cause of the problem. Because of the black screen issue i I wanted to backup my files saved in the phones memory. However my phone is locked through my fingerprint and I guess because of that when I connect my phone to the pc im unable to access my files. Is there anyway I can access my files through a pc and unlock it using my phone's fingerprint alternative password?
TIA
If the initial logo sometimes won't show up, it sounds more like hardware as that is not part of the ROM
If your phone is secured by fingerprint, wait for it to boot, press the home or power key to wake it up, then swipe like normal, if it's just a faulty screen, the fingerprint swipe should still work
*Detection* said:
If the initial logo sometimes won't show up, it sounds more like hardware as that is not part of the ROM
If your phone is secured by fingerprint, wait for it to boot, press the home or power key to wake it up, then swipe like normal, if it's just a faulty screen, the fingerprint swipe should still work
Click to expand...
Click to collapse
hey thanks alot swiping the through the black screen unlocked my phone. so do you think it is a hardware issue I assume its the LCD?
but if ever the LCD is broken , the finger scanner should also not be functional? or im wrong?
The finger scanner is a separate button (Home button)
There are two parts to the screen iirc, the digitizer (Touch) and the panel itself for displaying, could be just the panel if the digitizer is still working
You can use this to control your phone without a screen, might help
http://forum.xda-developers.com/showthread.php?t=2786395
i'm experiencing the same problem again. Before I guess after 40-50 restart I was able to open my s5 with a screen, but now it happened again and the difference is that when I boot it the "Samsung s5 powered by android" rarely shows and it will proceed until the home screen with a black screen?
i have already removed the battery, charged it, changed battery, boot it in recovery and safe mode but still all i'm getting is a black screen.
Any idea how to fix this? Is this a hardware issue already
kenchii17 said:
i'm experiencing the same problem again. Before I guess after 40-50 restart I was able to open my s5 with a screen, but now it happened again and the difference is that when I boot it the "Samsung s5 powered by android" rarely shows and it will proceed until the home screen with a black screen?
i have already removed the battery, charged it, changed battery, boot it in recovery and safe mode but still all i'm getting is a black screen.
Any idea how to fix this? Is this a hardware issue already
Click to expand...
Click to collapse
Hi kenchii17
As you didn't provide answer to @*Detection* 's suggestion for backup, here comes another:
[TOOL] Tickle My Android
To get rid of all this inconvenience, I would suggest a complete reinstall. Clear everything through Recovery and then flash a new Stock ROM via ODIN.
Nice regards.
.

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