Acer OS X laptop died / can't wake up!

[acersadness]

i just installed Leopard to my Acer Extensa 5620 -- everything (except internet) worked flawlessly. Before I could configure power or much of anything, I left the machine for a few minutes and when I returned it was dead (or sleep).

 

*Nothing* I can do will wake it up! I press the power button, a few lights go on, then it shuts off.

 

I've tried pressing power and various combinations of F2, delete, F10, etc -- nothing works.

It will not power on long enough to boot from a CD.

 

the Leopard installation was running from a USB drive.

 

I removed the CMOS battery + RAM sticks -- same result

 

any ideas??? did I just kill my Extensa? if so, how can others prevent this from happening?

 

thanks in advance