[Q] Xperia Ray stuck at Sony logo

Hi guys, I'm in a deadlock situation trying to recover my Xperia Ray. It just stuck at Sony logo. I know there is a lot of topics with the same issue, I've tried all that I could and most of the instructions that I can find on the internet, but not luck.

Here is what I've done but unfortunately, none works:

1) Install Sony Update Service, select Xperia Ray and reinstall the latest firmware. [Result: Successful, but still stuck at Sony Logo]

2) Download the .ftf (I flashed almost all version, GB, JB etc) , wipe everything, and flashed using flashtool. [Result: Successfully flashed, but still stuck at Sony Logo]

3) Unlock the bootloader, using Flashtool, I flashed several custom kernel and rom combination, (Lupus, Xkernel, Ice Bean Rom, MIUI rom, Xperia HD rom). [Result: Successfully flashed the custom kernel and rom, CWM from the kernel loads fine to flash the rom, but after flashing, still stuck, this time at the kernel's logo]

4) Relock the bootloader, tried to reflash the firmware using Sony Update Service again. [Result: Successfull, but stuck at Sony logo, again]

That's it, please help me, anyone have any idea on what can I do to solve this? Is it possible that this is the hardware defect, not software?

I'll really appreciate your help.

Anyone? My last resort would be to send the phone to Sony service centre and see what they can do.