Share your experience!
I have had an xperia L for 6 weeks and after 2 weeks it started shutting down itself. I thought it may be a software problem, so I did a restore. That didn't solve it, so I then used PC Companion to try and solve it. This also didn't work. I have restored 4 times but nothing has worked. As a last resort, I flashed an overseas generic ROM with the 15.0.A.2.17 upgrade onto the phone. Still has the same problem, so I know it has to be a hardware issue.
When i contacted customer support about the problem, they said they wouldn't warranty it because it has a different ROM version. So even if I can prove it's a hardware fault, they will still charge me for the repair??? If this issue doesn't get resolved satisfactorily, then this will be the LAST sony product i will ever buy.
Why don't you flash the original firmware?
when you say different ROM do you mean that you have a Custom ROM?
Don't forget to give Kudos
I can't flash the original firmware because I don't have it and I can't find it anywhere. It's a generic Taiwan rom
and the phone company weren't any help in trying to find it. In hindsight I should have backed up the original ROM.
I flashed an Indonesian generic upgrade 15.0.A.2.17 which is customization firmware.
I'll try to help you out, just don't forget to give Kudos
How to manually update, downgrade, root 2013 Xperias
http://talk.sonymobile.com/thread/124152
and you MUST check this
thnx M8 
Let us know how it goes