M Box - G4 ...Just keeps crashing and crashing...

[nessein]

I have got a G4 1 gig 512Ram OS 10.2.6 - Pro Tools 6.1.2 - M Box...

...It has never ever been stable, and I get the Grey Screen of death very regularly. I have tried everything to do with the OS and Pro Tools, I have changed the USB Lead, Tried a different M Box, replaced the Ram, Logic Board and main processor. I have had an approved desktop installed that has proven very reliable on many other Pro Tools Rigs, so that has ensured such things like drive formatting and energy saving etc etc are all at optimum.

My system crashes in no particular order; it will work sometimes for days and then other times crash 10 times a day, other times I am confronted with a Grey screen telling me to restart my machine. These events happen irrespective of any changes I may make to both Hardware and Software.

Apple say my machine comes up great when tested - it doesn't crash with anything other than the M Box - although I have used a second M Box to rule that factor out.

Has anyone else had such a disaterous experience? Is this sort of problem indeed fixable? and indeed was it fixed by replacing the Computer?

Any help at this stage would be really appreciated.

Regards,

Nessein.