Guide: Reviving your phone - Force Boot
A quick guide to reviving your phone
If your phone wont turn on at all, either normally or in bootloader mode try this:
Here are two pictures that should help.
The pins to short are: (click to enlarge)

To short the pins, use two small pieces of wire or similar. I used two sewing needles stuck together: (click to enlarge)

Also check in the Downloads section, muncheno made a video of this which is excellent. It’s under ‘other files’.