Here's a thread dealing with a similar problem to yours. You might have to sbf your phone, which basically means reload a stock firmware using a desktop program called rsdlite. You'll need some juice in your battery to accomplish this.
MY power button is broken and i can not turn on my droid. I have tried the restart where i hold the x and when i press the search button nothing happens. when i plug into my oc all i get is the bootloader screen. if anyone could help i would appreciate it