P30 vog-l29 bootloop after replacing motherboard - Huawei P30 Pro Questions & Answers

Hi all, I hope someone can help.
I recently encountered a Bluetooth issue, where the signal strength was very weak when using multiple pairs of headphones. I downloaded a BT signal strength app and using this, I found the strength hovered around 30-40%. Having had my screen replaced previously by a local repair shop, I suspected there was a loose antenna, so I opened the phone to find damage to the motherboard, whereby a small piece of the board was completely missing.
I then purchased a used motherboard from eBay which I then fitted. However on powering up the phone, all I got was the Huawei logo on black start up screen then it turned off. With charger connected it would continuosly bootloop. I then done factory reset and restarted the phone and after a few failed boot ups,it eventually powered up. It was locked with the screen lock from previous owner, which they were happy enough to supply. With the phone unlocked I then set about setting the phone up using my own Google account and all seemed fine. Every aspect of the software/hardware appeared to working perfectly.
I then updated to emui12 which appeared to download and install, however the phone went back into the previous state,whereby it turns off after the Huawei logo appears.
I have no file available in eRecovery. If I put my old damaged motherboard back in the phone boots up first time. I would at this point have given up and reverted back to my old motherboard, however when taking it out,the upper microphone has broken clean off the board.
Any advice out there?
Thanks in advance

Update, which may help anyone in the same position.
It appears the motherboard is paired to the battery and the boot loop issue was resolved when I used the battery from the donor phone I took the motherboard from. I assume buying a new battery would have been another solution had I no access to the battery which was paired to the motherboard I used.

Related

(Untethered, official) Kaiser not booting in? HR doesn't help.

Has anyone ever encountered the Kaiser's becoming completely dead, out of a sudden? HR doesn't help. It has the official Kaiser ROM - and not even any hacks.
After starting, it just prints "smart mobility", vibrates once and, atter a while, repeats this in an infinite loop.
Menneisyys,
my unit did exactly the same thing. Had to send it back, unit was exchanged for a new one.
This behavior goes hand in hand wit the "Standby of Death" and "Red Light of Death" behavior where the unit will no longer wake up from standby or will no longer start up even though a charger is connected. There is a thread on XDA-dev. about this syndrom.
The only information that I can give you is that my first Kaiser which finally died exactly like yours mid-December showed erratic behavior like restarting three times after soft reset and the SoD right from coming out of the box. The replacement unit never showed anything similar.
As far as I can remember there is a good chance that HTC as released a faulty production lot to the market showing these problems.
Get your unit replaced under warranty. Re-flash or any other repair attempts won't work.
Rgds
Joe
I had that issue. I went into bootloader and flashed a new ROM and it fixed the problem.
I am having the same problem now too - I can get it to hard reset after some twists, but it refuses to work when I restore a backup, I'll see if I can get a case that I can repeat so I can send it back...

[Q] No Signal at all after replace the housing

After the replacing of my X1's housing with the new one in the SE Service center I went home gladly with my new X1 housing. I noticed there's an error in signal in my X1 when I was checking my phone at the SE center.. But I thought it was maybe due to poor reception thus I neglected it. (the officer in the SESC say so)
Now I know that there's some new problem arise.. Any idea what might cause this error? the phone can read the Sim card but there is no signal (no connection, no call or no data can be made). i try to check the antenna module, but it seem to be OK (i did not see any problem on it).
the next day i came to the SE center, they said it might be something wrong with the software (since i am used using cooked rom) how come it can make any different while i'm using it before i replace the housing. and they have to take it into the HQ. and guess what, it may take another 6-7 week... WTF
is there anyone having the same problem with me?
Well if you have the tools, you can try openingu p the bottom cover, that little rubber thing where it has the mini sony ericsson logo. Open that rubber up, and you should see a mini screw in the middle, open that up take it out, maybe just give it a quick clean, fit it back properly, and make sure everything is tight and see how that works out.
I've seen/heard a few people having such issue when taking the housing off, and not placing that radio/reception thingy back properly, therefore causing issues with reception.
briian_ said:
Well if you have the tools, you can try openingu p the bottom cover, that little rubber thing where it has the mini sony ericsson logo. Open that rubber up, and you should see a mini screw in the middle, open that up take it out, maybe just give it a quick clean, fit it back properly, and make sure everything is tight and see how that works out.
I've seen/heard a few people having such issue when taking the housing off, and not placing that radio/reception thingy back properly, therefore causing issues with reception.
Click to expand...
Click to collapse
I did it twice, just to make it sure that everything was on their place, also try to flash the ROM, The Radio but still remain the same....
any other suggestion or idea what should I do?
Same problem!
I had disassembled my phone by myself twice; the first time it worked perfectly, the second, unfortunately, it didn't!
I bought a new antenna module for U.S. $10, installed it myself (warranty ended three months ago), walked out of the service centre and voila; I had reception and managed to make a few calls. However, on the way back home, all calls placed while driving dropped every 5km, which means the hand-over between cell towers was failing. The moment I walked home it was dead; no reception whatsoever indoors.
Now the way I see it, this could be due to one of the following two reasons: either the RF power amp failed, which means that most probably the phone needs a new main board (too expensive, not worth it) or something went wrong during the assembly, like the smearing of a sensitive part by skin oil (thus causing a short circuit) or failure to position a connector or multiple ones to connect properly to their respective terminals/connection points.
Upon further investigation, I noticed that my phone wasn't properly grounded; whenever I connected it to a computer to sync using ActivSync or in disk drive mode, I got a small electrical shock (painful though) whenever I touched the phone. This, however, doesn't occur at all when I connect the phone to the wall charger. I disabled USB charging since day 1 of owning my X1i
I believe that the battery cover acts as a ground for the phone electronics; it touches four golden connectors which in turn touch the mini USB port, the GPS/Wi-Fi/Bluetooth antenna, a point on the main board half an inch away from where the loudspeaker is, and the metallic cover placed over the phone RF chips. Failure to ground the phone properly can result in either damaging any of these chips, building up a static charge that affects the antenna performance, or an open-circuit condition for one of the many systems on board.
Since my phone is fully working as a PPC now (PPC functions, Panels, Keyboard, Camera, GPS, Wi-Fi, Bluetooth, etc...) and since I get reception outdoors, and since I have a brand new antenna module, I am guessing that either the RF amplifier is dead, or the housing is ****ed up beyond repair (i.e. it can't be aligned perfectly to get perfect contact on all said points) that it's either shorting a connection, or opening one that is vital for the cellular radio to function properly.
So what to do? Well I forced my phone to do two things:
1. Settings > Phone > Band
- Network type: I chose GSM instead of Auto, as we don't have consumer CDMA in Egypt
- GSM/UMTS Band: I chose the correct band for my provider instead of Auto.
2. Settings > Connections > Advanced Network > Disabled HSDAP
What happened? It worked indoors for a minute, and then stopped working again! Frustrating! So what did I do? I ordered a completely new housing off CNN and will attempt to rebuild the damned thing.
I will update you if I find out anything or reach any results with this phone that I love so much and hate more than anything I have ever hated in my life...
More info!
- During the drive mentioned above, the phone was switching between H, E and G, which means that all three RF chips are, or all components of the whole RF chip if it's one responsible, are working. At one point I got 4 bars of H and call quality was perfect between hand-over failures.
- Before disassembling my phone for the second time, people were complaining about high-pitched static; it can blamed over the mic, the RF (antenna or chip) or humidity levels (which are currently as high as 85%) affecting cellular communication channels.
- Flashing the firmware (R3A Generic UK) and hard-reseting didn't solve the problem.
More Info!
- The battery cover isn't the phone's ground; it's grounded by being connected to four ground points: the mini USB port metallic frame, the GPS/Wi-Fi/Bluetooth antenna ground, a ground point on the main board and the metallic cover over the sensitive RF chips.
- This is definitely an assembly problem. The reception is great outdoors switching between all bands and speeds. On my drive to work today it worked getting G, E, 3G and H all in 4 bars. The signal, however, is completely unstable, jumping from one speed to another. I am more inclinded now to believe that a new housing will fix this problem. Your housing was probably handled poorly at the service centre, which in turn caused this problem.
My advice is to shake them a little bit and see what they will do.
A New Housing didn't fix it!
I purchased a new housing from CNN. It came in good condition. The phone looks brand new now but still no signal. I am sending it in for service. I guess I blew up my Power Amplifiers...
Good luck mate!
melaskalany said:
I purchased a new housing from CNN. It came in good condition. The phone looks brand new now but still no signal. I am sending it in for service. I guess I blew up my Power Amplifiers...
Good luck mate!
Click to expand...
Click to collapse
Same problem haa...
I still waiting for a good news from the service center... I have been waiting for a month..
I wish You a good luck too...
I'm having the same problem. I opened up my phone a few days ago to clean the keyboard. The bottom row wasn't working correctly. Unfortunately after I closed it up again, it wouldn't get any reception (and the keyboard's bottom row was still not working correctly).
So I figured it was the antenna and tried to reposition it. I even removed the rubber layer as described here: http://blog.whitesites.com/How-to-Increase-Reception-on-Sony-Xperia-X1__633958291637656250_blog.htm
Outside I get ok reception, but it's far from stable, inside I get none. And even if I get reception inside, once I pick up the phone, signal drops. So I thought about grounding as well, problem is I even tried rubber gloves and that doesn't solve the problem. I'm afraid replacing the antenna's won't help here and my xperia is dead. Anyone has any other ideas?
Been there too!
I tried the same solution the blog explained. However, I ended up not getting any signal at all. It's only after I purchased a new cellular antenna+buzzer module that the phone started getting an unstable signal outdoors.
Did you notice any small pieces falling off the main board or the housing? It's either a hardware failure or a simple short/open circuit situation that can be fixed in a blink of an eye!
Question
Is there any possible way, hardware or software, to test whether all chips on the main board function properly? I tried the diagnosis tool available here but it doesn't check the chips one by one.
Service Centre
I took my phone to the service centre 6 hours ago. With the new housing on, and new screws that I scored from a secret source of mine, they deemed the phone untouched and serviceable; i.e. it passed for a phone that hasn't been tampered with!
They told me to call back in four days. I will keep you guys updated. Cheers!
I wonder if that'll fix it So to summarize you have:
- new housing
- new screws
- new vibramotor
- new antenna
And those things twice and that fixed it maybe?
I guess it's time for a new phone for me
Vibramotor?
Who said anything about changing the vibration motor? I installed a new antenna + buzzer module; i.e. a new cellular antenna and a new loud speaker (external speaker). The loud speaker is housed within the antenna module. My bad, maybe that part was vague because I never explained it enough.
And yes, it has a brand new housing too. I only installed the lower part though, as the upper part is just fine. Maybe they will fix it man; maybe they won’t I really don't know. I do hope they will fix it though.
I am currently using a backup cheap Nokia and ordered the Sony Ericsson Aspen. If they ever fix my X1 then I can change seamlessly between both phones. If not, then I will just use my X1 as a media/GPS device in my car and an Internet device over Wi-Fi.
Lucky you..... if they can fix yours in a few day... since mine has been in the service centre more than a month, without any news...
they said to me that it will take about 6 week...
What a joke!
The phone remained at the service centre for a week. They called me yesterday, and told me that the phone was fixed and that the total cost was EGP 100 (~U.S. $18). I went over and as soon as I held the phone in my hand to test it, it lost the cellular signal. When placed on the counter, the phone had a constant E signal.
I asked to speak to the manager, who told me that they just reflashed the phone with the latest firmware (Generic UK R3A, which I already had installed). Oh, and before that, he said he was sorry but the phone had a hardware problem and that they don't fix hardware; they only flash firmwares and if that doesn't fix the phone, then the user is pretty much on his own! I refused to receive the phone, so he gave me a refund for my money and promised to have its hardware checked and get back to me in 24 hours!
What a joke, what an f'ing joke! I already regret ordering the Aspen that is due to arrive next week with a friend of mine returning from Paris...
melaskalany said:
The phone remained at the service centre for a week. They called me yesterday, and told me that the phone was fixed and that the total cost was EGP 100 (~U.S. $18). I went over and as soon as I held the phone in my hand to test it, it lost the cellular signal. When placed on the counter, the phone had a constant E signal.
I asked to speak to the manager, who told me that they just reflashed the phone with the latest firmware (Generic UK R3A, which I already had installed). Oh, and before that, he said he was sorry but the phone had a hardware problem and that they don't fix hardware; they only flash firmwares and if that doesn't fix the phone, then the user is pretty much on his own! I refused to receive the phone, so he gave me a refund for my money and promised to have its hardware checked and get back to me in 24 hours!
What a joke, what an f'ing joke! I already regret ordering the Aspen that is due to arrive next week with a friend of mine returning from Paris...
Click to expand...
Click to collapse
OMG...
I do hope that you will get the good news next...
Bad News!
Deep breath... Ok!
Here is the deal: the service centre officially announced that the fault lies within the Mainboard; i.e. my guess that the Radio Frequency (RF) Power Amplifier Chip is toast was correct. They want to charge 90% of the phone's original retail price (which was EGP 4000 = U.S. $700) for a new Mainboard. I replied that that was impossible. They will contact SE's HQ and get back to me on Saturday to see if they can offer any other alternatives.
I guess that is the end of my ride with the X1. I will sorely miss it; it was a great phone while it lasted. Let's hope that the Aspen won't die on me in a year as well...

[Q] N1 fixing puzzle, wise advice needed :)

Hi!
I'm trying to fix my Google Nexus One replacing damaged hardware from an accident it suffered months ago. So far, I've changed the flex cable ribbon, the gps antenna, the lcd display and the digitizer.
After changing all of that, the phone seemed to work fine, but the desktop dock connection wasn't working because the connector at the mainboard was damaged. I tried to fix it solding it with tin (VERY BAD IDEA...) and instead I got the motherboard damaged. Somehow, the bootloader wouldn't boot after showing the X logo...
Therefore, I bough a broken nexus on ebay and replaced the motherboard. Now the phone boots fine, but there seems to be a problem when turning on the display.
Not every time that I switch the phone on the lcd display does too... 60% of the times the phone boots without showing anything on the display, and when it does show the boot process and boots, the display doesn't come back after the phone goes to sleep mode. It's like a black screen of death, but not only once the phone is booted, but also when turning it on.
I've tried changing the default HBOOT to blackrose,switching between different ROMS, or even repartitioning the sdcard with no success. I know that most of you would think that I should stop trying to fix the phone and get a new one, but I really want to fix it, it means a lot to me (and I'm also learning a lot from this!).
I'm kind of stuck now... I need your wise advice... what do you think is causing that behavior? The motherboard? The LCD? Any advice on what to do to fix it?
Thanks for everything!
Sounds like the connection between the LCD and board.
Sent from my Nexus One using xda premium

[Q] HTC one M7 Screen dead

​Hi there can anyone help me please on this matter.
My wife has a HTC One M7. last week the phone fell in to the bath. I managed to open the phone up and clean it.
The phone was taken apart and cleaned correctly using the correct circuit board cleaning solution (sorry cant remember the name).
I then ordered a new battery as the old one was not holding full charge. I also ordered a new screen + digitizer as the old one was cracked.
I have put everything together and charged the phone.
The phone charges correcrtly and has no problems at all.
When i switch on the phone it starts as normal and makes normal sounds etc BUT the screen is dead.
There is NO life in the screen at all even though its a new screen etc.
I know that the old screen is working and even using that i still get nothing.
Has anyone else come across this issue ?
Are there any guides to test the screen driver IC etc ....???
Thanks for your help in advance
It seems like that you have got a faulty screen.
amebb said:
​Hi there can anyone help me please on this matter.
My wife has a HTC One M7. last week the phone fell in to the bath. I managed to open the phone up and clean it.
The phone was taken apart and cleaned correctly using the correct circuit board cleaning solution (sorry cant remember the name).
I then ordered a new battery as the old one was not holding full charge. I also ordered a new screen + digitizer as the old one was cracked.
I have put everything together and charged the phone.
The phone charges correcrtly and has no problems at all.
When i switch on the phone it starts as normal and makes normal sounds etc BUT the screen is dead.
There is NO life in the screen at all even though its a new screen etc.
I know that the old screen is working and even using that i still get nothing.
Has anyone else come across this issue ?
Are there any guides to test the screen driver IC etc ....???
Thanks for your help in advance
Click to expand...
Click to collapse
MIght be a faulty screen as said above, maybe a broken or badly connected flex cable. And since the phone went into the bath, maybe a defective motherboard. Its very hard to tell.
as @alray said, it's hard to judge what's the cause of the dead screen, it may be one of the three causes.
so first, you can connect your old screen to the motherboard, if it can still work, to check whether the mother board was damaged or not
if the old screen can be lighten up, you can exclude the possibility of damaged motherboard.
second , you can connect your new screen to the motherboard again. Just be carefully and pay attention to the connector. Make sure it is connected correctly. If the screen can't be lighted up, you need try to use achohol or something else in a small brush to clean the connector. Handle gently to avoid damaging the IC. After that check whether the IC has lost some part or not. Then, if the flex cable or connector is fine, you can connect the new screen to the motherboard again.
finally, if the new screen still keep the same same situation. you can almost judge that you ordered a defective part.
May the steps above helps!
Hi there
the screen works fine as well as the connectors.
These have been tested on another htc one phone.
I have noticed that the motherboard connecter is damaged..... i will try to get some pics up later today.
Thanks

Moto service center f-kd up my phone? What happened here?

Bought my phone in November and until May it was working perfectly, I thoroughly enjoyed the phone.
During the installation of the April security patch my phone got stuck and I had to reboot it.
As a result, Android didnt work anymore. Even after hard resetting the phone was super slow and full of errors.
I sent it back to an official Moto service center; so they could reset the firmware.
When I finally received my phone back, I notice there were marks on the back-glass that werent there before.
the "repair paper" said that "broken parts have been replaced".
The phone works quick again, except that the loudspeaker cracks really bad on 80% volume... and when calling I can hear a very soft but subtle abnormality in the speaker as well.
I also notice a small delay with the fingerprint scanner, which wasn't there before.
When I look into the android recovery menu I can see that this phone has a different serial number than the one I sent to them.
- Do you also think they gave me someone elses phone? Because my loudspeaker didnt crack at all at high volume.
- Is this legal ?
Simply repairing android doesn't require opening up the phone to "replace the motherboard", right?
Seems like they had to replace mainboard. Which is logical, because Android errors might have been a result of damaged memory.
At least this would explain serial number change.
And the speaker problem might be a result of incorrect assembly after the repair. (this happened once to me, when I received my Lumia 930 after the repair, headphones jack was not working correctly. It did not react when headphones were connected - fortunately, when I started to move the plug in the socket, the socket "jumped in" into its place and it started to work again)
I'd return the phone and request them to fix the problems you described. I don't think much more can be done on the discussion forum

Categories

Resources