When a computer monitor starts blinking, or goes from low light to brighter light and vice versa,...

[G+_Rich Mclean]

When a computer monitor starts blinking, or goes from low light to brighter light and vice versa, is it a sign of one going bad?

[G+_Chris Skinner]

It sounds like a bad connection to your video card.Check video cable and connections on both ends

[G+_Carl Elton]

Rich Mclean Do you have it on Eco mode. I had a couple of monitors do that because of a light sensor. Try turning it off Eco mode and see what happens.

[G+_Ben Reese]

Could be a bad board (usually a capacitor if so). That would cause it to either not turn on or not stay on (blinking).

 

If it's VGA, check your cables as Chris Skinner? said. If it's HDMI, I don't think that would matter.

 

My bet is on an auto brightest mode like Carl Elton? suggested or on some circuitry going bad. I just replaced a few capacitors on mine a couple weeks ago.

[G+_Richard Bell]

Assuming that this is for a desktop.

 

I agree with above, check cables and re-seat cards, maybe swap out cables. If the monitor has a power brick, test it or try another one.

When was the monitor manufactured? If it is anywhere around 10 yrs old it could be subject to the capacitor plague.

 

https://en.m.wikipedia.org/wiki/Capacitor_plague?wprov=sfla1

[G+_Mike B]

Could also mean your power board is on the fritz.