[G4] MDD beginning to freeze up

[Brian Deuel]

On Nov 14, 2009, at 1:17 AM, Bruce Ryan Nakamura wrote:

> Hello,
>
> My G4 MDD with dual 1.25 Mhz processors that can boot up natively  
> in OS 9 is recently beginning to freeze up upon boot up mostly in  
> OS 9, in particular when I switch from Tiger to OS 9 and restart.
>
> I switched to my back-up external drive and got the same freezing  
> problem. Zapping the PRAM didn't solve the problem. Do I have a  
> hardware problem?

Your mileage may vary, but this is the same behavior my MDD (same  
specs as yours) exhibited a couple of weeks before my processor card  
went up in smoke. Hindsight tells me that I should have pulled the  
heat sink off, cleaned the old thermal paste off, and apply new  
paste. After the unfortunate event, I did a postmortem and found old,  
dried out thermal paste that couldn't have possibly been effective  
anymore.

This is not to say for sure that this is what's happening to your  
machine. I just wanted to share my experience for you and perhaps  
give you something to try that may be effective.

Brian