Hi, Im new to macs. I got a second hand powerbook recently. The Lombard bronze keyboard jobby. Now i had trouble with it for a while and then it said "cache problem" . It wont work correctly and after a bit of research i found out that the cache memory fails on the processor daughterboard after 3 or 4 years. Is it worth me getting an upgrade card (they seem abit unreliable from what i have read) or strip the machine and sell the parts off? I paid £275 for the machine and got an external scsi cd burner with it. (16x). Any suggestions? Cheers Charlie.