Although it might not be thought of in terms of traditional maintenance, you should make sure that the room temperature in which you house your computer equipment is kept at a uniform level. Anywhere from about 65 degrees to 85 degrees Fahrenheit is acceptable. In addition, keep computers away from windows, heating ducts and doors that directly open to the outside. If temperature seems to become a problem with a computer system, the first line of defense is to periodically open your system and to pull and re-seat expansion cards and ribbon cables. Some individuals feel more comfortable in allowing a computer technician do this work, but it is well within the realm of an average user.
Temperature variations can also occur where integrated circuits are socketed on a motherboard.
Most average users should NOT attempt to pull and re-seat integrated circuits. Signs that you are experiencing temperature variation problems are normally associated with computer glitches that occur. Maybe in the morning, the computer system will fail to initially boot, but after a few minutes the system seems to work fine. The problem mysteriously clears up after you have turned the system off, gone to lunch, and then restarted it when you got back. Sad to say, the computer system involved seemed to be on and running and the monitor was as my friend had said was dead.