8-year old 17" color monitor has served us well on the home PC, but recently
started having a problem. Every 20-30 minutes the screen goes red for a
brief instant, and then goes blank into standby mode. If I power cycle the
monitor, it immediately comes back up and stays fine for about another 20
minutes.

I have not opened it up yet since I am still using it, but plan to do so
next week so wanted to ask if anyone has seen this before or has any ideas.
My thought is that it is something in the power supply that is temperature
sensitive, possibly electrolytics. I have no schematic so any advice or
thoughts would be appreciated before I open it up.

Thanks in advance.

Bob