My 12" PB is on the fritz again. The optical drive died a while back and I was able to use FWTDM to reinstall, etc, etc.

I just got the flashing ? again now, but I can't reinstall because FWTDM is not working. When I restart holding down T all I get is a blank screen. How can I get around this? I don't have to go a' cutting, do I?