Averatec 7170 power on trouble - experts only?

Averatec 7170... Performance is stellar. Everything works, battery good for 1 to 2.5 hours depending on how I'm working it, charges properly, everything checks out. However, I have trouble getting it to turn on, after it's been carried somewhere pressing the power button does nothing, sometimes, other times it's fine. Plugging it back in, nothing happens, no charging light, won't turn on. Then after about a half hour all is good again. Always comes on when plugged in, and on battery if it's just been resting. Sounds like something is loose. Earlier Averatecs have had power connector issues, these are different, with a separate board. I've had it apart, cannot find anything obvious, no bad connectors, cannot find any cold solder joints or anything like that. My computer expert friend has no idea. I did spot a place where the layers of the main board are separating, as if from a solvent drip. Yes I can service notebooks to some degree. Any ideas? And don't tell me to buy a mac.