I recently acquired a 128 that was dead on arrival. Some troubleshooting revealed that the 5v pins on the power supply were good, but there was nothing at all on the 9v pins. I opened it up and discovered a blown resistor and a blown fuse. Two questions: 1) does anyone know of a good place to get a replacement fuse (the one for the holder, not the one on the board--it's 125v 1.6a, 1.25" x .25")? and 2) Is there anything I need to watch out for when replacing the resistor?
I will note that the blown fuse was not actually in the fuse holder--it was strapped to the side, and soldered to the wires. Looks like it was manufactured that way, but I see no reason why I can't put a fuse in the holder and simply connect the wires. Or am I missing something obvious?
I will note that the blown fuse was not actually in the fuse holder--it was strapped to the side, and soldered to the wires.
We had that same exact problem with the power supply on the club's C128. Ray Carlsen found the cause of it shorting out and fixed it. I suggest you send an e-mail to Ray and ask.
Since the power supply is new to me, and I don't know how it was treated in the past or what might have caused it to fail in the first place, I'm going to replace the fuse and the resistor first. If it blows again, I will absolutely contact Ray. The man has quite the reputation as a miracle worker!