Default Xperia Sola doesnt boot

I was playing Plague Inc on my X Sola (SlimKat 4.4.3 and when wanted to exit the game i got black screen. The phone was connected to the computer and charging. I cant turn it on now. Cant get into flashmode, fastboot, hard reset dosent work. Flashtool doesnt recognise it... Only the red led is lighting when I plug the phone to the computer.

Could someone help me? Is it possible to bring it back to life?