I tried to install a game in my HTC Desire z and it hanged my phone that I couldn't turn it off. I removed the battery and put it again after some moments . but it never turned on again. no by power. no by menu+power. no by down volume+poer and no other keys. when I put it in charge , no reaction and no led turn on. it seems like a damaged and dead mobile. What I have to do to make it alive again ?