I recently acquired a Macintosh Classic II. I booted it up for the first time and it seemed to be working well. I then stepped away and returned, and the screen was frozen with an empty window box over the desktop. I turned the computer off after hopelessly trying to get a response out of it and turned it back on. I could hear the hard drive whirl, but no tone indicating boot up.
I tried several more times sporadically over the next two hours to no avail. Finally, I let it sit and after a while gave the Mac a gentle "love tap" and tried the power again. I got a dim jacked up screen. I turned it off and back on, and it booted up as normal. Hmm... lose connection inside? I left everything alone and touched nothing. After two minutes, the Mac let out an audible static sound, the screen got dim, and nothing worked. I turned it off and on again and it was jacked up again. Then it stopped working all together. I kept trying, gave it a few more love taps, and turned it back on again, and it booted up as normal... and after two minutes it got jacked up again.