Thread: My desire z just won't turn on...at all.

It started crashing every now and then a couple of months ago. I kept having to take the battery out to restart the phone.
It happened again today, about four hours ago, but when I put the battery back in, I get no response from the phone whatsoever.

I've tried charging it, but no light appears.
I've tried just leaving it for a couple hours to see if it'll fix itself; no such luck.

This is my first mobile phone so I don't know what to do when things break down like this.

Thanks!