Sony Xperia E3 dual is not turning on(check details). - Sony Xperia E3

I have Sony Xperia E3, while playing game suddenly it turned off itself.
before that, since two weeks it had been turned off several times very next day.
I always repaired it using PC companion as it was urgent.but now it is not even booting.as previous,it stuck in boot loop.
I don't want to repair it from a local store as they are demanding more money(the boy in repairing shop gave me advice to change the sim card as it would have virus creating that boot loop problem & I had already repaired it 2 times from the same store).Now PC companion is also not helping.Please help!!

It's strange, but with no logs is difficult to determine what is the problem you are having. It might be the SIM or SD card, or other hardware problem, but you could test some options before repairing.
If you have already unlocked bootloader, flash a recovery and install CyanogenMod11 rom, which is very stable and could fix problems with stock.
If your phone has locked bootloader, try to use unofficial flashtool and in Xperifirm option, download other stock rom for your model and flash it to see if problem is fixed.

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The current status of my phone is , when i start it, it briefly vibrates then a blank screen appears for 5seconds. Then nothing for another 5 seconds, then the blank screen again... its the blank screen loop.
I dont see any Sony Ericsson logo or NAA kernel Logo.
The phone was running of
1. Naa Kernel v10,
2. cm7 1.9
3. unlocked boot loader
Things i tried:
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2. Flashing Naa kernel v11.
3. Repair my phone using Sony Ericsson PC Companion.
4. Hard Reset.
5. Disassembled the device and the screen cables are good.
The adb does not recognize my phone, the flash tool recognizes my phone, but the PC Companion does not. When i select the Support Tool in the PC Companion and repair my phone, the PC Companion re-installs the Stock ROM successfully.
But still, i am stuck in the blank screen loop.
I had PMed this scenario to some experienced devs here in XDA.... and got replies too.... that didnt help again....
Please do help.
Thanks in advance.
It seems to be a hardware problem and not a brick.....
thanks to @leajian for the advice....
Thats a relief..... will give the device to the service center and see.....
Post closed...
I've bricked my SGS2 loads of times just by flashing roms, I just flash a stock rom back and start again then use my jig - that resolves bricking
Yup...
i did the flashing like 100 times....
restored the phone with pc companion another 100 times...
still the same thing..... blank screen loop.....

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