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Hi All, I've down a fair bit of web searching but haven't found a reason as to why this would be happening. So here goes:
Basically, I bought the Asus P525 when it was about 9 months old, and after about 4 months it decided to flash this up on my screen - Invalid or Missing Sim Card. It seemed to fix itself, however, and I had another week of using it. Then, it did it again, and fixed itself again shortly after, but it wasn't long before it was dong it so often that the phone became unusable. It would flash that up, and usually stay that way, it would become a rarer thing for it to fix itself. So, back to my crappy old nokia with half working buttons I went, telling myself I should ring an Asus repair center and talk to them about it. Anyway, a couple of months later I got around to ringing them, they told me they'd probably have to replace the mainboard, and it could cost me more to do that than to get a replacement phone. Not very impressed as I was, I decided to boot the phone back up, and amazingly it worked again, and gave me another week of usage before packing it in. Now it's stopped working, so I tried different roms and different firmware, to see if that would fix it... nope.
So here I am. Anybody experienced this? Any idea what I can do? I don't have heaps of bucks to throw around on phones, I really like this phone except for this obvious problem, so would like to keep using it. But I don't think the future looks bright for it
Any help is extremely appreciated.
Thanks
Matt
Seems I've asked the impossible...? Anybody have any ideas? I'm going out of my brain trying to work this one out...
Matt
It seems noone in this part of the forum likes to answer questions I'm afraid.
As to your problem, it's likely a hardware fault and theres a loose connection betweeb SIM and phone somewhere.
You could try cleaning the contacts with an electrical contact cleaner solution sprayed on a cotton bud and wipe the pins that sit on the SIM.
Maybe you could also try using a needle underneath the pins and gently pull them up so that they make better contact with the SIM (maybe some are bent).
Bear in mind, I have no experience with this device and the sensible option would be to take it to a repair shop for service.
Hope that helps.
yeah I know what you mean
Thanks for the suggestions. I have tried to bend the pins up but that didn't work. I haven't tried cleaning the contacts... sadly though I think that may not be the issue. I'll definitely give that a go, I'll try just about anything, because obviously if I can't get it to work it will just sit in my girlfriend's car so she can use the maps and camera on it. Seems such a sad waste really...
thanks again for your help
Matt
I just powered it up, and it's working again. God knows for how long though... could it be a battery or cpu issue?
Alright, I own a Samsung Continuum. The problem I am having, that I need help resolving, is that the Antenna port (little gold colored metal thing, that external antenna' can be inserted in), located under the battery of my phone, is completely gone and the area where it was is scratched up. The connection to my internal antenna is gone and my signal is gone.
I DO NOT, want to buy a part. I'd rather rig it if I can.
I DO have access to a LARGE amount of tools, including a soldering gun. I have the tools available to me, to fix a phone.
With the port gone, I was wondering.. Is there a place on my phone, where I can reconnect the internal antenna and get it working again? I have the time and patience to try anything. I do not care about any risk that this has to my phone, if I can't get it working, I don't have a use for it.
And how does this port work by the way? Whats it connecting the internal antenna to?
Thanks in advance.
Hi Everyone,
This is my first time posting as I am normally pretty good at googling solutions. But this time I am pretty stumped!
I brought an Nexus S i9023 and the speaker on it was faulty. It worked but it hissed and popped and was extremely quiet. Sounded like a dodgy connection more than anything. If you put pressure in the right place it would work for a few seconds.
Hence I decided to go and buy a replacement. I brought the replacement speaker with a new lead on it too from Aliexpress.
It arrived promptly and well packaged. It was obviously brand new too as the flex had not been bent.
I fitted this today but it doesn't work. nothing not a sound.
I put the old one back in and low and behold its hissing and making noises as per usual.
Can anyone tell me if I am missing anything here? Its definitely the right part, It fitted perfectly too.
Massively stumped and if anyone could suggest anything it would be greatly appreciated.
Fastraxs
Cannot think of anything else than to refit the new one and double check the connections...
if you've got a multimeter, measure the resistance (Ohms) across the terminals and compare to the old one, it should give you
a reading of a few Ohms - measure the readings with the speakers not connected to the board - that way you can deduce
if the "new" speaker is in fact good or not
gunner49 said:
Cannot think of anything else than to refit the new one and double check the connections...
if you've got a multimeter, measure the resistance (Ohms) across the terminals and compare to the old one, it should give you
a reading of a few Ohms - measure the readings with the speakers not connected to the board - that way you can deduce
if the "new" speaker is in fact good or not
Click to expand...
Click to collapse
Thank you very much for the advice, my situation has gone from bad to considerably worse! So, I had the original which was quiet making funny noises and then the new replacement which wasn't doing anything. So I decided that perhaps it was just the speaker and decided to solder the new speaker to the old flex and see if I was in business.... exactly the same issue sound was working but very quiet and fading in and out and hissing etc. Hence I thought right then, got this one sorted its the flex. Back to the iron, I soldered the original speaker which I knew was working to the new flex, but still no sound tried a few times as I was worried that the connection from the new flex to the speaker wasn't quite solid enough.
This is where things got....well....rather gutting! The phone isn't turning on anymore. I get the screen light up for a split second, then go dark again. Tried to do all the usual things such as removing battery, tried to get it into boot mode (holding sound up and power), I get nothing when plugged into pc, nothing when plugged into the charger. I am worried that when soldering the speaker I could have bridged the positive and negative terminals and hence made it short. Would this blow my motherboard up? Is that even possible?
I am now at a complete loss what to do now, and before I do any more damage, I thought I would consult the experts. I should also say that it is completely stock and hasn't been rooted or anything along those lines.
Any help, advice, suggestions would be greatly appreciated! Again thank you gunner for your advice it is greatly appreciated, but my situation is rather worse now and I think I have a rather expensive paperweight on my hands.
I'm sorry things have gone to worse mate I assume you've been doing the soldering with no power to the phone!?
If you're suspecting you may have shorted the speaker, I think its a good idea to check that! I suggest to desolder, clean and resolder.
Put some soldering flux if you have any as those little flex things are sometimes a pain to get them attached.
I'm not familiar with the NS circuitry but I reckon a shorted speaker would not result in blowing the whole board! Before assembling
everything back again, check whether there are any tiny bits of solder that may have stayed on the board or to the components.
Clean around the soldered area carefully.
Also, you might want to check if the phone powers up with no speaker attached at all. You might be having another issue as to why its
not turning on.
Good luck and hope you can have it back up and running again mate!
I got a Nexus 5 off a friend for a decent price because he dropped it and bent it up a bit. After giving it a quick look, the only thing that seemed damaged was the black little coax wire that connects the main board to the board on the bottom (Assuming it goes to the antenna), The end simply got bent off. This was an easy fix, replace the cable no worries. The real problem is when I went to go test the phone after I fixed the cable, it doesn't get any cellular signal (Wifi/BT still works), draws a crazy amount of power and the 'Qualcomm WTR1605L' chip specifically gets extremely hot, to the point of overheating in like 30 mins. Rather than tossing a bunch of money into replacement components (or getting another nexus 5 with a bad screen or something) I'd prefer to narrow down the problem to one specific component. This leads to my question:
Does anybody have any ideas to how I can further troubleshoot and diagnose this problem, or knows what the problem exactly is?
I have tried a few things, like if I flash the LG G2 radio (A trick I learned I could do with my Nexus 4/LGOG, after backing up my EFS just in case), Wifi and Bluetooth still work while Cellular, GPS and most of the other sensors do not. This stops the big power draw and overheating issue, but doesn't really do anything to further identify the problem component. I noticed that the modem image could be mounted as vfat and you can mess around with the various parts of the image. I don't know which files do what, so I have thus far left it alone.
I know this seems like an odd question to ask here, half the time I see responses like "Send it into Google/LG and have them fix it for you" but that isn't really applicable in my situation
Also, I know that my SIM is good, it works in my Nexus 4, I know that my ROM isn't a issue, because I have multirom installed and tried many different roms. The Radio image shouldn't be an issue because I had updated the phone from 4.4 to 4.4.4/L Preview since I got it (Using the google images and flashall script). IMEI/Whatever the ESN equivalent shouldn't be bad, my friend had been using it before he dropped it.
Thanks in advanced for any ideas, and sorry for the long and comprehensive almost to a fault thread.
dtalley11 said:
After giving it a quick look, the only thing that seemed damaged was the black little coax wire that connects the main board to the board on the bottom (Assuming it goes to the antenna), The end simply got bent off.
Click to expand...
Click to collapse
Dropping a phone can sometimes cause invisible damage (like BGA solder joints failing). Visual inspection can only tell you so much.
dtalley11 said:
This was an easy fix, replace the cable no worries. The real problem is when I went to go test the phone after I fixed the cable, it doesn't get any cellular signal (Wifi/BT still works), draws a crazy amount of power and the 'Qualcomm WTR1605L' chip specifically gets extremely hot, to the point of overheating in like 30 mins.
Click to expand...
Click to collapse
I used to build small electronic projects when I was a kid. When something overheated like that, 90% of the time it was a short or a the wrong value of component. It's possible the drop caused the antenna connector to short out. Try disconnecting the antenna cable and try again with the stock radio firmware and see if the radio continues to overheat.
(I'm not sure how flashing the radio would prevent overheating, unless the original firmware simply turned up the transmit power in an effort to contact the tower, but that's my first guess and should an easy thing to eliminate).
ScottyPcGuy_03 said:
I used to build small electronic projects when I was a kid. When something overheated like that, 90% of the time it was a short or a the wrong value of component. It's possible the drop caused the antenna connector to short out. Try disconnecting the antenna cable and try again with the stock radio firmware and see if the radio continues to overheat.
Click to expand...
Click to collapse
Thanks for replying! When I get home I will give it a shot and see if it still overheats, then update this with my findings.
If it is overheating then it must hardware issue. Worst case is that the PBC board has a crack somewhere because of the bent. Grab the service manual from the general forum and start mesuring the components to find out where is the problem.
bitdomo said:
If it is overheating then it must hardware issue. Worst case is that the PBC board has a crack somewhere because of the bent. Grab the service manual from the general forum and start mesuring the components to find out where is the problem.
Click to expand...
Click to collapse
Ah, thanks. Something like that should be a sticky. For future reference/making sure we're on the same page, I found the thread here: http://forum.xda-developers.com/google-nexus-5/general/service-manual-d821-t2791303
dtalley11 said:
Ah, thanks. Something like that should be a sticky. For future reference/making sure we're on the same page, I found the thread here: http://forum.xda-developers.com/google-nexus-5/general/service-manual-d821-t2791303
Click to expand...
Click to collapse
Yes that is it.
ScottyPcGuy_03 said:
I used to build small electronic projects when I was a kid. When something overheated like that, 90% of the time it was a short or a the wrong value of component. It's possible the drop caused the antenna connector to short out. Try disconnecting the antenna cable and try again with the stock radio firmware and see if the radio continues to overheat.
(I'm not sure how flashing the radio would prevent overheating, unless the original firmware simply turned up the transmit power in an effort to contact the tower, but that's my first guess and should an easy thing to eliminate).
Click to expand...
Click to collapse
It seems to overheat with our without the antenna cables on the stock radio. I noticed that it still gets warmer than it should with the G2 radio, it just takes a lot longer.
That service manual is really comprehensive but unfortunately, it is going to take me some time to actually get to looking it over closely.
Hi,
I replaced the screen of my brother's Nexus 5 and even so the display works perfectly we seem to have destroyed a component.
I managed to connect the device to lte/3g/2g networks (see photo in the attachment) and sometimes a few packets are even successfully transmitted but that's an exception. Usually it is not even possible to load a website within a reasonable amount of time..
Wifi works.
Stock and cm13-caf firmware show the same behavior.
Like shown in the photo the phone is successfully connected to a 4g/lte network.
Phone calls on a 2g-network work.
Any ideas to which component we have to replace? Or any hints on what could give more information about the actual issue?
Thanks in advance!
Best Regards
Michael
Does the original screen still work? If it does, you could try moving everything back to see if that makes a difference.
When you replaced the screen, did you use a where the LCD/frame/glass were pre-assembled?
Thanks for your response.
I had two replacement displays and noticed the same issues with both of them.
(I bought a cheap one first from ebay which had multiple touch screen issues and only after that bought a way more expensive original replacement unit.)
Hmm, hopefully, it is not a motherboard issue. I would suggest trying the old screen is possible.
Another part that may affect signal would be the USB flex port cable. The other pieces that attach to the motherboard are the camera, headphone jack, USB charging/data cable, and battery.
We completely destroyed the old display unit after removing all other components except for the battery. This made it easier to bend it and remove the battery without damaging its enclosing.
I'm afraid it might be the mainboard but was hoping for a cheaper solution . The usb board is still a possibility since it routes a quite a few signals between components.... Are there some schematics of the device available online?
Haven't seen any schematics.
I guess you didn't use a hair dryer to warm the adhesive before using a spudger to remove the battery.
Examine the USB flex cable to see if there are any breaks.
If you get a phone with a smashed screen and working internals, you should be able to get the phone working.
I wasn't sure if heating up the battery is a good idea and since the old screen has already been damaged I really didn't care if it's even more so...
Heating the battery is fine as long as you keep moving the hair dryer around. The battery just needs to get warm, not hot. Also, you would heat it from the front of the phone, not the back.
I bought a Nexus 5 with a damaged display unit online and used its mainboard and antenna cables to fix my unit. Everything works again. Seems to have been something on the mainboard but I have no idea which component exactly.
Thanks for updating the thread with your solution.