At 8 years old, you might have some challenges.

Some of the architecture has changed - CPU, memory, disc connections, even the power supply feeds and voltages.

I'd also consider if just getting the data to a newer machine and installing programs again might be a better investment in time and money.

POP is usually not good - I'd probably try to determine if it's just the power supply, and if so, replace just that.

MB would be a likely show stopper for me.