I've probably destroyed my 5500/275 logic board

[mstrecktias]

Hi all!

I have a 5500 that I tried to fire up the other day. Before I put it to storage last time, it was working. The PRAM battery has since long been removed, and I've connected an adapter with variable voltage setting (1,5-12 V).

I plugged in the adapter as well as the main power cord and flipped the main switch on the computer. It powered on, the fan was running (louder than I remembered), the green light on the front was lit, but no picture. I flipped the main switch back off and then on again. Still no picture. I flipped it back and forth one more time and then...nothing. I pulled out the plugs and said farewell, it had to happen sometime... But then I noticed: the adapter connected to the PRAM battery socket was set to 12V!!! Crap!

Anything I can do except to try find a replacement logic board?

 

[Byrd]

Hi mstrackias,

Welcome - 12V aside (it would have booted without a PRAM battery), I'd strip it down to a single known stick of working RAM, reseat cache card and press the little CUDA switch on the motherboard.  Hopefully all may not be lost!

JB

 

[AlpineRaven]

I agree above said - it can boot without PRAM battery. Check RAM and remove anything that is connected to the board even when you re-insert the tray back in make sure nothing is jamming up the connectors.

The fan on the CPU would have dried up bearings hence noisy
Cheers

AP