On Sun, 30 Aug 2020 at 15:33, Tom Hunter via cctalk <cctalk@classiccmp.org> wrote: > About 70% of the PCB had solder joints that were nice and shiny like brand > new. The remaining section near the front of the drive was quite badly > corroded and it also looked like there was some liquid spilled over that > section of the PCB (component side).
This and the rest of what you describe sounds quite like the damaged caused by electrolyte leaking from failed capacitors. This is probably the most common cause of failure in electronics after they get to 2-3 decades old. There was one particular time when this happened prematurely: https://en.wikipedia.org/wiki/Capacitor_plague But it is a general problem with almost all capacitors. I could be wrong but this seems more likely than rodent pee... Personally, I have failed caps in 3 Apple Macs -- one PowerPC and two MC68000. All are awaiting repair. -- Liam Proven – Profile: https://about.me/liamproven Email: lpro...@cix.co.uk – gMail/gTalk/gHangouts: lpro...@gmail.com Twitter/Facebook/LinkedIn/Flickr: lproven – Skype: liamproven UK: +44 7939-087884 – ČR (+ WhatsApp/Telegram/Signal): +420 702 829 053
