Sleep wakeup screen issue

[cobrasneverdie]

I don't think I should be worried about this, but when my imac is in sleep mode, and I turn it on with the black screen and the login info. There are green little dots on my screen scattered... I should try and take a picture of it. I tried to command shift 3 but I couldn't

This happens sometimes. anyone know the cause of it? screen related?

 

[TMRaven]

Do you only get it from waking up from sleep? How about regular booting up? Can you put it back to sleep, then wake it up again, and the problem will disappear?

At first I wanna say it's a power supply issue. But things are hard to diagnose with computers: it could also be logic board or gpu.

 

[cobrasneverdie]

Do you only get it from waking up from sleep? How about regular booting up? Can you put it back to sleep, then wake it up again, and the problem will disappear?

At first I wanna say it's a power supply issue. But things are hard to diagnose with computers: it could also be logic board or gpu.

it's just through sleep mode right now, does not come on at all during normal usage or booting it up

 

[Hellhammer]

Try SMC and PRAM reset. Run Disk Utility as well. Sounds like it's a graphics glitch if it only occurs when waking up from sleep.

 

[cobrasneverdie]

thanks mang! I'll try that, time to use el google!