I'm still stuck in the 90's - bought an LC 595 back in '96 and did all my personal accounting on it (wrote my own programs using Lotus...lol) - it has recently bit the dust. Someone donated a Peforma 5200CD to me and I had it up and running for awhile but now I get the disk with the question mark on it when starting up.

It seems I need a system/installer disk (7.5.1?) - I cannot find one anywhere. If anyone could point me in the right direction it would be greatly appreciated.

Why not from the mothership? AppleCare Support - Older Software Downloads (http://www.info.apple.com/support/oldersoftwarelist.html)

Your hard drive may have broke, if you can't reinstall or even see a partition when you install that might be the problem.