Xperia J fix problem (don't start, black screen, continuos vibro

[zavbaz]

When i insert battary the phone began vibro neverending, Screen is black (totaly). The PC don't see new device when i connect via usb cable. Press and hold (before coonecting and after i try too) power and + voloume or power and - voloume or just voloume + or - black screen  again. Vibro buzz all time when battery inserted. Little reset button hiding under cover. I try press, press 10-30 seconds dont help too.

Have anybody know can i fix this at home (old model service stoped) Have any ideas where to start ? 

If i can connect device in any mode (fastboot or something like this) i can flash and fix, riht?

If you can help fix with good advice or have any idea please send your idea

[Uliwooly]

@zavbaz

You might want to contact your Local support to get it inspected

[zavbaz]

This can be good solve for problem. But 1 sony dont support this model (too old 2 I do not buy this phone - my friend gave it to me (his mothers old phone) without any documents and guarantee i think ? So sony engeners reject support this. Sadly. I have my own modern smart. Fixing old devices my hobbie (not work or businness) some is easy to fix some like this is make me feel stupid child