Starting to see app logos in dock through the TV shows I'm watching...

[Turnpike]

It's as if the canvas screen I'm watching movies on at the drive through is becoming thread bare, when I am watching a movie on Hulu or Amazon or iTunes on my iMac in full screen, I can still make out the app logos in the dock through the picture... is this a software issue, a setting, or screen issue?

I realize you can hide the dock, but I don't want to do that- I am wondering why this happens, it didn't used to do this in the first 5+ years I had the iMac. If it's the screen starting to go, I want to know ahead of time.

 

[Macschrauber]

This is lcd screen memory, you can try to get rid of it if you display picture noise in that era for quite some time.

 

[Longplays]

I realize you can hide the dock, but I don't want to do that- I am wondering why this happens, it didn't used to do this in the first 5+ years I had the iMac. If it's the screen starting to go, I want to know ahead of time.

I auto hide the dock to avoid the problem you are encountering now.

I've been using this iMac for 10+ years and all I'm experiencing after ~8hrs/day nearly 4,000 days of use is the dimming of the LED backlights at the edges.

I hope you get it sorted out.

 

[bmoraski]

I auto hide the dock to avoid the problem you are encountering now.

I need to start doing this.

 

[Turnpike]

This is lcd screen memory, you can try to get rid of it if you display picture noise in that era for quite some time.

So you mean the same image appearing a long time in one area is causing this? Some kind of burn-in?

 

[Macschrauber]

So you mean the same image appearing a long time in one area is causing this? Some kind of burn-in?

Some kind of memory effect, yes. Had this recently with a Flatscreen LCD TV displaying Videotext for hours. Cured it by tuning into an analog channel and let the ants run for hours.

You my try to loop this video fullscreen:

 

[DeltaMac]

As a test, try hiding your Dock, then play a video, just to check if the image remains. If it is simply transparency of the background, then hiding the Dock should then make that image that you see thought the video also disappear (no Dock icons, not even a faint image. But, if you have image retention, then the Dock images should still appear.
The "white noise" video may help recover your screen.

 

[Macschrauber]

Also you can make a screen shot and move the picture. If the dock moves with the picture its somehow stored in the vram and the issue is elsewhere.

 

[FreakinEurekan]

It’s technically called “Persistence” but a lot of people refer to it as “Ghosting.” Googling with those terms should show you far more than you ever need to know, but yeah - running some random “white noise” video for a few hours normally cures it.

 

[h9826790]

Some kind of memory effect, yes. Had this recently with a Flatscreen LCD TV displaying Videotext for hours. Cured it by tuning into an analog channel and let the ants run for hours.

You my try to loop this video fullscreen:

There are so many different aspect ratio's monitor now. I couldn't find a video that can fit my 32:9 monitor 😓

Therefore, I just wrote a tiny app to switch colour (full screen) every 1/30 second between red, blue, green, white, black.

A super basic app which has no UI.

Launch the app will go into full screen mode automatically, hide the mouse pointer, and keep the monitor flashing.

The user can use Command + Q to quit.

P.S. I only build and run it in 12.7. But should work from Catalina to Sonoma.