Definately a Hardware issue! [BAD SNAPDRAGON CPU]

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Hello fellow XDA-forum members.

To start with , I've bought an LG E900 from Germany via Ebay about a week ago.
It is brand new (Updated to the latest available update on Zune) , even some stickers are still on it. The First four days of usage were normal ( all things worked as they should ). Then suddenly , two days ago I've experienced some issues while browsing the web. I've got several restarts and "no sound" issues.
After that ,I started googling and found that a lot of people have problems with LG optimus 7. I found that a lot of people have the same problem when they play games , well i still haven't occured any problems while gaming, only when browsing web. I did send a letter to LG to get more information about this issue(specificly).

My question is , whether this problem is related to hardware or software? If it's a hardware problem , then which chip is affected. I am willing to repair it on my own, if a chip is badly soldered (I do have some experience).

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28.06.2013
Hello dear members , today I tried to reflow my phone's motherboard components. I reflowed an Audio IC chip first , still same , restarted and loss of sound. Then I reflowed the RF Chips , still same. Furthermore I tried to reflow the Snapdragon CPU , but LG DECIDED to put SOO Much epoxy under it , that the chip couldn't get enough air during the reflow process. The result was obviously bad , some of the solder balls exploded under the chip and short-circuited it(at that moment , I realized that my phone is dead). Only reball + new CPU chip would fix my phone (or a new mobo ofc).

Best regards , Kiura.

Ok , today I got an answer from LG Electronics. They claim that It's not a hardware problem, this problem is related to software. They gave me instructions to factory reset my phone, which I've obviusly done before. They gave me 2. options :
1) Resetting the phone under phone settings - about (Which I've tried before without any successful results)
2) Dialing ##634# with password ********* - then a menu pop's up where you can test phone components and do other stuff , like resetting factory settings etc.

Today morning , I tried the second option. I'm gonna test the phone for the whole day surfing web and playing games , then I'll let you guys know about the results.

2) Dialing ##634# with password ********* This will install MFG application- see here for more http://forum.xda-developers.com/showthread.php?t=841892 or make a search for mfg app

Bah , after i plugged my charger in ,the phone lost it's sound again. Had one restart too. I think Factory Reset would not help , because it won't downgrade your OS.
LG insisted that the problem is in software.

Is there any possibility to downgrade the software on the phone or flash it ?

You may use zone to roll back your phone
(zone backup the phone before update )

I flashed my phone today , by installing EU OPEN rom on my Phone. Eventually without a success. Phone still has sound issues...
I think the problem is in Hardware.


If anyone may know something more specific about this problem , please let me know. I can't just dump the phone... Maybe a cpu or some chip is badly soldered on the mainboard(well that doesn't make sense , because games run just fine)? I just need specific information about this issue.

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Best regards,Kiura.