Seeing shadows on my computer monitor on a white page, why?

Answer 1

On a CRT (glass tube) monitor, this is typically caused by screen "burn in." If a static image remains on the screen in one position for a long period of time, the screen phospors burn in, and you are left with a shadow or the burned-in image.

We see this a lot on well-used corporate monitors, wgere a company logo or a data entry screen image has burned into the monitor. It's a bit of an annoyance, but if you can live with the shadow, the monitor should still have some life left in it. There is no was to repair or remove the burn in.

LCD displays do not have problems with burn in as a general rule. Plasma displays do, however.

Burn in was the reason screen savers were developed. Modern computers simply put the monitor to sleep, making screen savers completely unnecessary.

Nowadays, screen savers are a waste of system resources, and have a negative impact on a computer's speed and stability. Aftermarket screensavers are often embedded with adware, spyware and other security issues..

Use the display settings in the Windows Control Panel to pit your monitor to sleep when not in use. You'll prevent further burn-in, and save on your electric bill.

Answer 2

Check the connection to the CPU.