Using a hair-dryer to resurrect a dead iMac CTR!

I visit this forum often enough to see how many people are finding it hard to get their old (but perfectly usable) iMac CTR to work again.
Well, after putting in a new battery, my good old iMac G3 400 SE slot loader was still not booting. I knew everything worked. I turned it off for a day, and then it wouldn't boot up again. All I got was a green flicker as I tried to power on.
Well, low and behold, I used a hair-dryer to warm up the inside of the system, and it booted up fine!
Hopefully this might work for some others with presumable dead iMac G3s. But the question is why??? If I put the system to sleep I get the same "playing dead" iMac and have to wake it up again with the hair dryer. Any thoughts?

Thanks for your input. Yes I did check a number of things, including all connectors fitting ok, but maybe I missed something. I did try swapping out even the logic boards and hard drives, to no avail. My guess it is something with the monitor itself, since the other components work fine, and only when the monitor is heated enough will it start.
I have no problems with the computer otherwise, but I hate to waste electricity - it just can't sleep or it will play dead. Thanks again.
I hope this might help others who might have the same problem thinking it is something wrong with the computer, when it is really the monitor. Go get those hair dryers revved!

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