It seems as though my Powerbook has lost it's memory (well half anyway)
The upper slot has died.

I swapped the boards over just to make sure it is the slot.
A quick call to a dealers and suspisions are confirmed.
Looks like I'll be back to using my 5300 for a couple of weeks
My Powerbook hasn't been more than 10 feet away from me in 275 days!
Maybe it had enough and fancied a break!!
Oh, well there's worse things that can happen
The upper slot has died.
I swapped the boards over just to make sure it is the slot.
A quick call to a dealers and suspisions are confirmed.
Looks like I'll be back to using my 5300 for a couple of weeks
My Powerbook hasn't been more than 10 feet away from me in 275 days!
Maybe it had enough and fancied a break!!
Oh, well there's worse things that can happen