This slightly yellowed plus4 was sent to me with a blank screen fault. Ted? PLA? CPU? Or just broken.. You decide!
Nice clean PCB, no signs of damage. At the point, I just turn them on (using my own tested PSU, not Mr Over voltage
2013), and see what gets hot. Or even lack of hotness!
So this one didn't need much more than a finger to tell me what was wrong.. Didn't even turn on my scope! Anywho,
I converted a good C64 PSU for use on the Plus4, stuck on all of the usual heatsinks and new caps.. And Bobs your aunt!