To repair or replace is always a fair question, but location is a big factor. I see working G3 iMacs advertised for $5 in California, but in my location to get parts from anywhere adds $40-50 freight to the cost, even for a logic board, and working units are rare locally. Nobody seems to bother parting out G3 iMacs in Australia.

The main risk in starting a major re-cap is that I could get to the end of it and then find the problem was deeper, say a failed PMU/CUDA chip. Anyway, while I wait for a logic board or working iMac to turn up at reasonable cost, I'll disassemble this one and see if I can see any evidence of other probs, before investing in the re-cap.

Rick