No 3g at all after opening and replace the power board. - Galaxy S 5 Q&A, Help & Troubleshooting

So after my capacitive keys died I ordered a new power board with the capacitive keys I opened and replaced the board.
But after that I can't get 3g or H+ signal I can only connect to 2g and 4g signals and I get complaints from the person that I speak that they don't hear me well and my voice sounds like I have 1 bar of signal.
Anyone knows anything about this problem?
I have done full restore, wipe everything, installed cm 12.1 but I have the same problem.

Possibly know a little about this......
Back in my S2 days, I had reason to replace the USB socket board.
Before I did it, I did some research and found that this board was in some way connected to the signal reception side of things.....
I also discovered that there are a number of different versions of this board, and buying the wrong one would result in loss of signal. This all may still apply to the S5.....worth checking out.
Look at your old board and look for some printing on it that may or may not say "rev X.X" (the X's will be numbers) then compare it to the new board......
http://i.imgur.com/rVnFwJM.jpg

keithross39 said:
Possibly know a little about this......
Back in my S2 days, I had reason to replace the USB socket board.
Before I did it, I did some research and found that this board was in some way connected to the signal reception side of things.....
I also discovered that there are a number of different versions of this board, and buying the wrong one would result in loss of signal. This all may still apply to the S5.....worth checking out.
Look at your old board and look for some printing on it that may or may not say "rev X.X" (the X's will be numbers) then compare it to the new board......
http://i.imgur.com/rVnFwJM.jpg
Click to expand...
Click to collapse
Thx ill give it a try

Related

Magician Radio issue

Hi,
I recently had a Magician shipped which seemed fine the first day of use, but at the end of the day, the gsm radio icon showed me a no reception, or 'service unavailable' message...
Now, after upgrading the Rom's (several used) and Radio update to the latest one (1.13 as far as I can see), I don't have any reception or 'service' at all...
The gsm radio always shows the '!' marker...
Anyone any idea where to look?
Loose cable, loose or bad antenna, software/rom issue?
Any ideas are welcome!
This device will be my test-unit for xanadux, but I want to make sure it's functional before testing stuff and debugging things that will never work because of a hardware or firmware issue...
Thanks guys!
Great work, super forum!
this is clearly a hardare malfunction. your device may not be identifying the sim card.
thanks for the quick response, but I don't think it's the SIM-slot that is causing me troubles... The SIM card can be read without any problem, and the pin code is asked and aknowledged by the phone. Once in a while I get coverage, but it always looks like 1 bar maximum, while my Trinity is lying next to it, same operator, and all 5bars of coverage notification are there, so it's not that I'm in a dead zone or black spot where there's no cell coverage at all.
I checked the upper back part (after removing the plastic casing top) and checked where the antenna is connected. Once, while holding and pushing onto the metal part that looks like the antenna extension, I got (just for 5 seconds that is) a connection, and signal level of 1-2 bars, but that dropped and stopped after a few seconds already...
I think it's a connection issue of some kind, internal antenna or the connection to it, but I'm not that keen on taking the unit apart to find out it's not that easy to sort the issue out...
Any help, info, ... can help...
Thanks!
the metal plate just below the top-backside plastic panel acts like the antenna.On top side of it there are two legs which connect to the mainboard.try cleaning the two spots on mainboard and the contacts of antenna.
well, i can say this because i solved this problem once this way.
good luck.
Well, I tried what you mentioned: scratched and cleaned the squares on the pcb, straightened the connecting metal parts from the back plate, cleaned all contacts: no solution...
Any other ideas?
Possibly a sort of switch which makes the device choose between internal or external antenna? What external antenna might fit?
Thanks guys!
Well,
I got my hands on a 'broken' I-mate Jam (got stuck between the car door, screen is totally broken, pcb is fine) and replaced the antenna block: FULL RECEPTION...
at least, for half an hour.. after that: reception dropped, and again left me with the "!" mentioning "no service"
I tried switching the pcb's but for some odd reason, the screen didn't come up good... The backlight didn't turn on and the screen was all striped and smeared...
Is there a difference in pcb versions, connectors, screens?
I thought Magcian = Magician, but now I'm thinking there are different models around there...
Bon... so I'm looking for a pcb of a Qtek S100 now... to switch that one with mine, and see if that helps...
really strange the reception was 'perfect' for about an hour, I even succeeded in making calls with it! No jitter, no drops, perfect reception, and then: BONK, over with it... nothing left...
Any ideas on this one, or any ideas on how to get the I-mate's pcb working in my Qtek?
Thanks guys for the info and help!

Going from H, 3G to E or G possible solution

Hey guys as soon as I notice this connection/data problem I decied to make a thread about it because this issue has been posted before but with little success on fixing it.
So have you guys notice that the signal of the HD2 will go from HSDPA or 3G to EDGE to GPRS and so on (sitting on the same spot) has this happened to you...?
I think that 99% of HD2 users have experience this. One of the the things that was causing for such a bad reception is also the 2.08.50.08_2 radio (in some areas) I live in L.A. California and I had that problem then the new 2.09.50.20_2 Radio seem to help out with this issue.
BUT!
That is not the actual problem, its not just software its actually a HARDWARE problem as well, Yup!
For you see HTC decied to put the Antenna AT THE BOTTOM OF THE PHONE not on the top. Almost 99% of the devices that receive some sort off signal (such as a radio or a phone) are made with an antenna ON THE TOP for obvious reasons, probably one of the reason why HTC decided to go through with this (even knowing that this issue would emerge) is because of the camera and the phone being so thin.
Check out the picture (the antenna is right under the batterie pins) so every time you hold your phone just around the buttons section at the bottom you are actually blocking the signal therefore making the connection go back and forward
SO WHAT'S THE SOLUTION?
Well one solution is...
You might be right on. My 1st gen iPhone had the antenna on the bottom and that would cause poor reception if you covered it up. There was even testing done to prove that was the case. It only had edge so it didn't bounce around like your HD2. BTW, I live in LA and have never had an issue with the 3G, as a matter of fact, I'm nearly always on 3G, I can't even remember the last time I saw E. I live on the West Side, maybe more towers around here, or I'm holding it "right"???
I personally think it's a combination of what you found and the T-Mobile network.
I think its more than just antenna placement. I have set my phone on the table and watched it go from H to 3G to E. The antenna is not covered up so there is some other issue going on. My coworker also has the phone and doesn't have the 3G issue. While the placement of the antenna could be part of the issue I think it can also be fixed with a radio update. I remember when I had the Wing I was able to boost reception with a radio update, yeah it shortened battery life but not by much. I'm hoping for a radio update that would make it a stronger connection.
tuppaacc said:
For you see HTC decied to put the Antenna AT THE BOTTOM OF THE PHONE not on the top. Almost 99% of the devices that receive some sort off signal (such as a radio or a phone) are made with an antenna ON THE TOP for obvious reasons, probably one of the reason why HTC decided to go through with this (even knowing that this issue would emerge) is because of the camera and the phone being so thin.
Link to the HD2 hardware pictures
http://forum.xda-developers.com/showthread.php?t=582652
Click to expand...
Click to collapse
-Exactly what item in that picture are you saying is "the antenna"?
-Can you please reference a link where you found that identification?
EDIT: A question for the others experiencing the "connection flipping" that this thread is about: do you ever notice the connection icon changing while you a have an "active" connection (i.e. when you're actually passing data), or only when the connection is live but idle? I'd like to add this to some other anecdotal evidence that a couple of us are looking at for a related theory on the cause.
Sorry to say, but it is not the antenna placement. My wife's phone gets 3G all the time and mine doesn't. I called Tmo and is waiting for a replacement.
I dont even get an H i only get 3g or edge im in los angeles but this makes sense.I doubt the antenna booster might work
guys, guys, it is not just an antenna placement problem as xeebot and speoples20 are stating is a COMBINATION OF BOTH I've been using the newest radio updated for one day and it seem to fix most of the Issue (haven't gone down all the way to E) like I said on my first post if you feel its the radio try the 2.09.50.20_2 Radio or the 2.7 they seem to be the most reliable ones.
if you still having doubts try covering up the bottom part of your phone with one or both hand and see your bars go down and sirphunke look at the attached picture that's where the antenna is, if you look thoroughly on the others you will notice the cable that hooks to the antenna at the bottom.
tuppaacc said:
guys, guys, it is not just an antenna placement problem as xeebot and speoples20 are stating is a COMBINATION OF BOTH I've been using the newest radio updated for one day and it seem to fix most of the Issue (haven't gone down all the way to E) like I said on my first post if you feel its the radio try the 2.09.50.20_2 Radio or the 2.7 they seem to be the most reliable ones.
if you still having doubts try covering up the bottom part of your phone with one or both hand and see your bars go down and sirphunke look at the attached picture that's where the antenna is, if you look thoroughly on the others you will notice the cable that hooks to the antenna at the bottom.
Click to expand...
Click to collapse
so with the new radio you haven't had the data outage???
tuppaacc said:
if you still having doubts try covering up the bottom part of your phone with one or both hand and see your bars go down.
Click to expand...
Click to collapse
just tried this and I'm afraid to say it's the truth...I think this is the worst thing the engineers could have done!
tuppaacc said:
sirphunke look at the attached picture that's where the antenna is, if you look thoroughly on the others you will notice the cable that hooks to the antenna at the bottom.
Click to expand...
Click to collapse
Uh....I am looking at the attached picture
Again, there's a number of components in that picture, and I'd like to know exactly which one you're saying is the antenna. The only cable I see in this shot is the one hanging loose in the middle right of the picture...and in the other pictures that cable can clearly be seen plugged into the side of the SIM card housing.
I've seen this same set of pics that was first posted here at xda, and I've seen all manner of other tech sites link and refer to these pics, but in none of them have I seen indiviual components identified/located...so I ask you again to please reference where you found your information, because as far I can locate these are the only component-level views of the inside of the HD2
josemedina1983 said:
so with the new radio you haven't had the data outage???
Click to expand...
Click to collapse
yeah with the new radio the signal is amazing as loong as I'm not holding the phone from the bottom
sirphunkee said:
Uh....I am looking at the attached picture
Again, there's a number of components in that picture, and I'd like to know exactly which one you're saying is the antenna. The only cable I see in this shot is the one hanging loose in the middle right of the picture...and in the other pictures that cable can clearly be seen plugged into the side of the SIM card housing.
I've seen this same set of pics that was first posted here at xda, and I've seen all manner of other tech sites link and refer to these pics, but in none of them have I seen indiviual components identified/located...so I ask you again to please reference where you found your information, because as far I can locate these are the only component-level views of the inside of the HD2
Click to expand...
Click to collapse
Reference where i found this info!? Like I said on my first post IT IS SOMETHING I NOTICE!! (its right at the top) haha
There... I updated the pictures on the first post I think that's the antenna (because it resembles many other phones I've open myself) the top ones could be the speaker or the flash GPS or BT, so no room for the antenna. Now you get what I'm talking about??
If you want to confirm this just open you own phone or contact HTC as I'm not a tech and neither was I there wen they build this phone...
lol

Droid-X and signal strength

hey all i have two droid-x that have had default froyo 2.2.340 and also the newest OTA 4.5.596 and also CM7 which is what they both have.
i have had them setup exactly the same way when i run these tests.
on my (lets call it "the good droid-x") it has great wifi and cell phone radio reception
on my (lets call it "the bad droid-x") it has crappy wifi and cell phone radio reception
you can tell something is not right when they are sitting side by side with the identical software (as mentioned above)
i am guessing its a bad antenna connection and that the wifi and cellphone radios use the same antenna.
i did not check with BT but for sure 100% the wifi and cellphone radios are about 1/2 of what im getting with the good droid-x
could someone please pull up a picture and circle what they think the antenna might be so i can try and see if i have a break?
it could be also that maybe the chips are not getting enough power or something but the phones function the same it seems so i dont know.
if someone could shed some light it would be great
i switched batts and battery covers and that didnt do anything either.
thanks
just wanted to give an update
there was some connections crossing in the phone that should not have been
i cant believe phone did not blow up on me
the led connectors were all touching
dont ask me how the phone kept functioning but i seperated those 3 big led connectors and now everything is working good
Very glad to hear you found the problem. Where did you get this bad unit? Is it possible someone had already opened it up?
zehkaiser said:
Very glad to hear you found the problem. Where did you get this bad unit? Is it possible someone had already opened it up?
Click to expand...
Click to collapse
most definately
this was what it was when i got it
http://iowacity.craigslist.org/mob/2443460199.html
i checked it out at a walmart parking lot...everything worked but i didnt really notice that the signal strength on the gps, wifi and cell radio were really CRAPPY to put it mildly.
so i replaced the screen (was hoping that might have been part of the problem)
powered it all up and everything was functioning the same as it was (crappy)
so i thought it must be the antenna must have came loose or something
couldnt find any info on antenna...many of you know i been asking in here and phonearena and in irc but no one seems to know the exact location
so i decided to switch the motherboard out with my good droid-x and guess what it did the same thing.
so that told me it was on the motherboard for sure
so i got my magnifying glass out and found some bad areas right away
seperated the crossed connectors and put it back together and BAM
has a better signal then my good one
im a happy camper now
i have 2 droid-x`s
Uploaded with ImageShack.us
i circled the area in RED those led connectors were pushed into each other and the little standoff was smashed down.
if it would have been like the old camera FLASH`s where they charged up...i would have hated to see what would have happened to me when i took a picture
BOOM!!
Need fix
Hi m16-maniac! i need the photo to fix my dx, the link its out, please send me to [email protected] or post here. VERY VERY THANKS.

Broken Wifi tab, working on solutions.

The tabs connecting the antennas to the motherboard is pretty fragile and breaking them is a big problem. Mine is broken, for unknown reasons, and I'm proposing some solutions.
Solder with wire
Someone tried to do this and according to the replies, its not safe and would probably lead to the end of the world. But the results are better than having no antenna at all.
Using other pins on the motherboard
Crazy idea, but would probably work. This is the part where I need help.
I labeled which I think are not important(Correct me if I'm wrong). #2.1 and #2.2 looks like ground tabs for the motherboard.
Im also planning on using the nfc's tabs, labeled #2.3, since I never use nfc and probably never will.
First of all, is it safe and reasonable to take these tabs and use them as replacement tabs?
If yes, then which tab should I use? #2.1, #2.2, or #2.3
I'm currently choosing between solution 1 and 2. Any comment would be deemed valuable.
Thanks
Image courtesy of iFixit.com
Bump. Anyone?
You are correct in your assumptions of what the pins purposes are... the pins you call "ground" are to ground the shield on the back cover... most likely to pass FCC requirements on RF emissions... and if you don't use the NFC radio, those pins would probably do fine also... you may end up losing the NFC radio after awhile running with no load on the antenna outputs so that may be a "no turning back hack"
I have powered up my tablet and used it for 30 minutes or so with the back cover removed to test my antenna mods so those ground pins are not required for the tablet to function properly... not like they complete a circuit or anything
Worked for me
I know this is an old thread but, FWIW, using the mentioned spring tabs (#2.1 & #2.2) worked for mine. As previously stated, they appear to just be EMI grounding. They probably clean up emanated noise that could otherwise interfere with the tablet's antenna reception/transmission. I moved them to replace the broken wifi tabs and so far reception for wifi works just fine. I haven't tried any other antennas yet but I suspect the impact is minimal on the other antennas.
I'll update if I notice any degradation to the other antenna functions.

[SOLVED] Extremely weak Wi-Fi signal

The Wi-Fi signal on my I9505 is terribly weak. Sitting at the same desk the router is on - full signal; Walk 3-4 meters away - signal drops to 1 line; Go to a different room - disconnects due to no signal. I can only see 3 networks at 1 signal line while on another phone I get 11 networks - all with signal at 2+ lines.
My router is perfectly fine (works as expected and has great coverage on other phones/laptops - it still gives off great signal if I go next door/above/below me).
Phone software side I'd say is fine too, but I'm not 100% sure:
Issue happens both on latest WizCyan (TW based) and on latest RR (CM14 based), both using different kernels.
Currently on XXUHPG1 bootloader and baseband. PDA version is XXUPPI1 (according to the "Phone INFO" app).
Hardware side, I've tried a few things - bent all of the golden springs I could find just a tiny bit upwards, tried to clean the gray contacts on the mid bezel as best as I could (dry microfiber) - they weren't dirty or anything, but they seem scratched/shiny where the spring would have come into contact, is that bad? (I can take pictures if necessary)
I even flipped the blue antenna wire around (though I think that one only affects cell signal).
I also have to note that there's something wrong with my Wi-Fi IC / mobo because sometimes it stops working altogether (won't turn back on), needing a reboot or physical intervention. I doubt that would affect signal strength, as long as it's actually turning on, I guess?
Edit:
SOLVED!
Well, this is probably a very unique/fringe case - I found out there was a crack in my motherboard, just below one of the antenna connectors. I also found out that pushing down on where the crack is relinks the motherboard connections and gives back the full Wi-Fi signal. So I "ghetto-rigged" a piece of plastic to push down on the crack when I put the mid-bezel back in, and it seems to be working for now. Hope it holds up and doesn't cause other issues.
Actually, it could affect signal strength. You might want to check your antenna wire running down the right side of the battery compartment and make sure it isn't broken or partly disconnected.
You should also note that some phones have better antennas, thus having better reception.
So comparing it to a different phone isn't really a good way to measure the effectiveness.
Took some pics, I've no idea if they're of any help. Maybe somebody can tell if there's something wrong.
Strephon Alkhalikoi said:
Actually, it could affect signal strength. You might want to check your antenna wire running down the right side of the battery compartment and make sure it isn't broken or partly disconnected.
Click to expand...
Click to collapse
That's the wire I had flipped around. I even disconnected it to see if there's a difference, and it only weakened the cell signal. Full cell signal when I put it back. No change regarding Wi-Fi. If I run the phone with the mid bezel off, I only get 2 lines even next to the router, and it doesn't even connect - so I suppose the mid bezel antennas connect?
Pwnycorn said:
You should also note that some phones have better antennas, thus having better reception.
So comparing it to a different phone isn't really a good way to measure the effectiveness.
Click to expand...
Click to collapse
True, still, from full signal to 1/0 lines as soon as I go from my desk (and router) to my bed 5m away isn't right. Wi-Fi reception used to be as good on my S4 as on the other phones. (I can't remember exactly when this started.)
I believe you have a radio chip issue. Something that software cannot fix.
Solved. Thank you for trying to help.
@cLick1338: Telling people you solved the issue without revealing the solution doesn't help anyone who may come across this thread in the future. So how did you solve it?
Strephon Alkhalikoi said:
@cLick1338: Telling people you solved the issue without revealing the solution doesn't help anyone who may come across this thread in the future. So how did you solve it?
Click to expand...
Click to collapse
I had edited the first post. Figured it would be most visible for such people.
cLick1338 said:
I had edited the first post. Figured it would be most visible for such people.
Click to expand...
Click to collapse
If you edited it yesterday I wouldn't have noticed it. The XDA app automatically drills down to the first unread post and I don't always think to scroll back up.
Sorry.

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