HTC Desire Rebooting on its own

It seems a lot of people having this problem.
A poll to count how many?
Mine doesn't have any problem, yet I'm worried.

HTC Desire SV reboot

Although, this is the "desire General" forum, this should add some information to the existing ones, hope this is okay

I purchased the "Desire SV" about 2 months ago, which also has the similar bug/feature of rebooting on its own, which started after almost a month of purchase.
By then I had installed a lot of crap apps and uninstalled them if I didnt like. Also I have Nova launcher and customized it to my liking.
The phone is still under warranty and default ROM.

Now on the reboot disease, after going through the forums like this, here is what I did.
1> Factory reset the phone a couple of times but it didn't help.

So 2 weeks back, spoke to the customer care guy & tried safe mode but no use. So I
2> Removed some of the suspected apps -> no use
3> Installed, CPU Spy, System Monitor, Diagonsis, alogrec, alogcat to study further -> helped me
4> Read somewhere that the GSM/WCAMA auto mode was some kind of a problem
So changed it to only the "WCDMA" mode. -> helped me

And then I started the 1st test last week, for about 100 hours the phone has been running fine.
All the while, I was checking for the probable clues using the above tools, and I also did this:

-> installed back the regular apps which I use and games like temple run 2, install &
uninstall some junk/trial apps --> No reboot occured.

-> Played Temple run 2/Browsed Internet on 2G & also Internet-Pass through/ as much as 1 hr everyday at random times --> No reboot occured.

-> On the move during the day and faced no problem on the calls or Internet --> No reboot occured.

-> However, Observed that the phone got hot on the top part of the phone's backside (i.e behind the proximity sensor or left side of the camera)

-> Observed that in "Diagnosis", temperature shot up to a maximum of 41 deg Cel during playing games or browsing or on charging --> No reboot occured.

Monitored the frequency range of CPU to see the track. @92Hours: 1GHz: about 8%, 245MHz: 15%, Deep Sleep: about 70%, rest all under 5%
couldn't use alogrec or alogcat since it was too much information for me to track the bug.

However, yesterday the bug silently occured and caught me unaware. I missed switching on the alogrec at 100 hrs. Here's the sequence of events about an hour before the reboot hit...
1> Observed signal low, but still opened Maps apps and browsed - Data transfer was slow even though there was no signal bar. Maps loaded very slowly on 2G connection.

2> Used Camera to click on a few pics (used flash and normal) & tx'ed 4 pics using bluetooth - all ok

3> Pocketed the phone and a few minutes later, BBBBBangggggggggg!!! Reboot occured
(Here missed to observe the heat on the backside of the phone)

Now I am not new to Linux or embedded Linux, but am a newbie to mobile communications and I don't know Java. So no app knowledge. So there is my limitation.

Any Questions? Any Inputs? All are welcome to assist in the 2nd test. Its definitely a radio issue.

The 2nd test is in progress.

Right, very interesting.... Just called HTC to book phone in for repair. Spoke to the girl which explained that reboot occurs when reception is weak and app you are using at the moment requires internet access. Because of the poor reception, some of the data is missing, and CPU has to work much harder, basically, it's trying to work with information which it hasn't got. Also, i told her that it happened not only when using gnav, but when playing games too, to which she replied that games access internet too (which makes sense, adverts). I'll do a little test later on today. I'll put phone on charge and will play angry birds with wifi on, and then with 3g on (reception is not that great at my place), and see if i can force it to reboot. If it doesn't reboot when wifi is on, and will when wifi is off, it will become a valid explanation i suppose.

Any thoughts?

BTW Bad news guys. She said that if reception is poor again, rebooting WILL start again even with new motherboard. Basically, once it happens it gets progressively worse over the time. Hope she is wrong, but she DID sound like person who knows about these things

Hello guys.
I am afraid I won't make you happy. I did have my Desire in repair 2 months ago
due to overheating-reboot problem.
Repair was successful. Motherboard was immediately replaced, no more reboots.
BUT until today! All started again. So my guess is this: It is design fault. In my opinion, every Desire will have this problem - it is just a mater of time, when the heat will degrade motherboard.
I'll send it to repair again.
Jan.

P.S.
1. one more clue - the reboots are accelerating - first, it has rebooted just once, playing games on AC adapter, but then reboots became more frequent, like a short surfing on WiFi + AC adapter and at the end just a 1 minute on Google Maps with GPS and 3G, no AC adapter plugged and 5x reboot loop until phone cooles itself to boot properly. It looks like less and less tollerant to CPU usage/heat.

2. I guess it is not definitely software based - I am using stock T-Mobile Froyo - no ROM/root modifications whatsoever.
My first repair was on stock T-Mobile Eclaire, the second one is on stock T-Mobile Froyo. These symptoms remind me behaviour of badly cooled PCs with AMD K5/K6 CPUs. The system is less and less stable and it takes shorter and shorter to overheat - chip/chips are being degraded.

craynet said:

folks, the issue that i am facing is quite frustrating. when i watching flash videos on youtube or other sites, my desire reboots automatically. it does not matter which browser i use, the native one or a 3rd party one ie Dolphin HD browser. the phone keeps rebooting until i remove the battery and leave it switched off for atleast 15-20 minutes. the phone is not overheating, neither is there some unwanted app running. my phone is rooted with unrevoked and have the clockworkmod version 2.5.0.7.

and sometimes when the phone reboots, i usually hold down the volume button to ensure it boots into HBOOT. After which if I try to goto recovery, the phone keeps rebooting again.

under normal circumstances though, i am able to get into recovery without issues.

i have tried factory reset/wipe 100 times already but that doesn't fix the problem. i have also reflashed a 100 times and that again, does not fix the problem.

phone details;

HBOOT-0.93.0001
RADIO-5.09.05.30_2
Android 2.2 with 2.13.720.2 CL274424 release-keys
Kernel - 2.6.32.15-gd96f2c0

3rd party apps installed;

Angry birds
Dolphin HD browser
pFinance
Profile Valet
Rom Manager
Titanium Backup
Winamp
Youtube ripper

also, in the past two weeks, the phone reboots while charging too...which makes it doubly frustrating!!

HELP PLEASE!!

Click to expand...

Click to collapse

Looks like your problem is same like mine.
Only solution is to send to HTC repair center for MB changing
I did mine, after change MB now my desire is superb again!!