I picked up a Color Classic a few years back and had it running but with an error screen. I decided to give repair another whirl with a more deliberate diagnostic mindset, and can no longer get the machine to power on. I've ensured the power switch is up/on, the computer is plugged in, and the power button on the keyboard (should still be) working. I removed the PRAM battery, on the off-chance that was the issue, but still no joy. I took a closer look at the board and my caps look good to my eye. However, after flipping over the board, I did notice this:
It looks like the interface indicated has corroded away (the plating seems to be flaking off?). Would this cause issues powering on, and assuming it does, are there any pragmatic options for remediation? I was planning to go over the corroded bits with some solder, but thought I'd get some opinions here, first.
Just for throughness sake, here's the top of the board: top of board
It's not exactly in pristine condition, but I didn't notice anything too egregious, either. ¯\_(ツ)_/¯