What causes this? Corrupted picture at turn on

[unplanned bacon]

New TV. Does this with my PC. Got new cables, stress tested the GPU and they passed (no change from the TV though). It's never done this with any other TV. With my old TV there was an issue of where the GPU was shifting the picture to the right and sometimes sound didn't work, was easily resolved and eventually permanently fixed itself

https://www.dropbox.com/s/c9f3ya9wlppybeu/2017-01-24%2022.21.03.mp4?dl=0
https://www.dropbox.com/s/kb36s9uppvbf633/2017-01-25%2001.20.36.mp4?dl=0
https://www.dropbox.com/s/ldxsv8zl4qbaq13/2017-02-01%2000.43.14.mp4?dl=0
https://www.dropbox.com/s/uz98rbuivlujja6/2017-01-24%2022.14.43.mp4?dl=0
^ Check the links. As you can see there are some instances where it's perfectly fine

Those were taken using the first TV, which was replaced with a new one of the same model which does exactly the same thing except for where there's all the static at the top. TV's going back regardless what the answer to this thread is, would just like to know the cause before I decide for sure what will replace the TV

The video with the yellow flickers is the new one. Integrated graphics produced similar results IIRC

GPU: GTX 780

EDIT: TV is a Samsung UE40KU6400

 

[derekullo]

Are you using a vga cable by chance?

Is this vga cable running under a new appliance in your room, like a microwave?

 

[unplanned bacon]

Are you using a vga cable by chance?

Is this vga cable running under a new appliance in your room, like a microwave?

HDMI. It's running past the Xbox 360 and its power adaptor. There's also my front right speaker it needs to go past, but that's been there for ages. Before the power adaptor wasn't there, it was on the floor, but the 360 had to move to accommodate the TV

High speed with ethernet which the manual itself recommends. I even bought HDMI cables labelled as 4K HDMI 2 cables even though AFAIK there's no such thing as a 4K HDMI cable. It was just for testing purposes on the chance that it could be the cables I was using

The yellow flickering was blue on the first set and I remember there was a review mentioning that happened to them and the issue can be found on the web. I fixed that issue by updating the firmware and then got a new problem (the one in the links). That video where there's a duplicate corrupt picture happened when the TV wasn't even getting a signal. PC had long since cut the video feed because it was sleeping. The 360 (nowhere near as severely affected) if it turns off while the TV is off, the TV will show the last image it got from it when the TV is turned back on before going to no signal. PS4 seems unaffected by this, but it had the blue flickering before. Tried the 360 and PC in different ports with different cables and no change.

 

[derekullo]

All i can think of is make sure your graphics card drivers are out of date / corrupted.

Passing a stress test just means the gpu won't crash, it can still show artifacts

Your xbox 360 picture looks great so this points even more so to the computer graphics drivers than the monitor.

I assume the last 2 videos are of your xbox.

 

[derekullo]

Do a complete uninstall of all graphics drivers then reinstall them.

Don't worry windows has its own basic graphics drivers as a backup to actually let you see a picture while you are reinstalling the actual graphics drivers.

 

[unplanned bacon]

Or are you passing the video from your pc through the xbox to your tv?

All the videos were PC. I saw no reason to take video of the Xbox 360
There's three HDMI ports in the TV
PC is in HDMI 1, 360 is in 2.

This happens at the time when the TV is (I assume) handshaking with whatever is on the other end of the HDMI cable (my PC) and then after that, picture is fine (before I updated the TV's firmware it was not fine) except for the picture with the tonne of static at the top

I removed the Xbox 360's power adaptor and the front right speaker from the equation and did a quick test. No change. Will see what I can do about those drivers

 

[derekullo]

Also something you can test.

See if those yellow artifacts are still show through samsung overlay when you try to change input.

If the yellow artifacts are in the overlay then its a tv problem.

If the yellow artifacts are under the overlay then its being corrupted coming out of the computer.

 

[derekullo]

Sorry about that last post about passing the video through your xbox.

I realized right after i posted that, that it was the samsung overlay, not xbox 360 overlay.

 

[unplanned bacon]

Also something you can test.

See if those yellow artifacts are still show through samsung overlay when you try to change input.

If the yellow artifacts are in the overlay then its a tv problem.

If the yellow artifacts are under the overlay then its being corrupted coming out of the computer.

From what I've seen I don't get the yellow artifacting anymore. Stopped the second the TV was updated to the latest firmware, but it was presenting with a new problem. Since this TV and the one it replaced (same make and model) behaved pretty much exactly the same and have been treated the same, the footage (except the yellow artifacting, that's from this one) is from the first one (I'd be creating redundant footage doing that). From what I saw though, the corruption did not affect the Samsung overlay menus. However, both sets can produce corruption when it is not receiving a picture (so the connected device is sleeping) before it realises and goes to the no signal overlay.

Seller was saying they couldn't recreate the issue with the first set and IIRC don't believe this one to be faulty, but when it's used where and how it's supposed it's faulting so... it has to go back. I can reproduce it pretty consistently. In any case it has a scratched screen which I'm really lucky to have found (it's not an easy one to spot). Samsung remote accessed it and reset the HDMI ports, but couldn't find a fault either so it's a strange one

I tried reinstalling my drivers. No change

 

[derekullo]

I guess it is also possible that early versions of that monitor shipped with faulty firmware.

It may have influenced the way the hdmi ports on the tv operated.

Showing yellow artifacts when nothing is plugged in could also have been caused by the firmware not working correctly with its own hdmi ports.

When you updated the firmware to the newest, which presumably fixed the issue, the seller couldn't find any problem with it.

 

[unplanned bacon]

I guess it is also possible that early versions of that monitor shipped with faulty firmware.

It may have influenced the way the hdmi ports on the tv operated.

Showing yellow artifacts when nothing is plugged in could also have been caused by the firmware not working correctly with its own hdmi ports.

When you updated the firmware to the newest, which presumably fixed the issue, the seller couldn't find any problem with it.

They wouldn't find the flickering issue, because firmware update fixed that. Some digging on the internet told me that's what would fix it
The new issue has chance where it may happen, or it may not. Power cycling by turning off at the power point fixes all problems (or did for the first set) until it happens again, but that's a workaround and not a permanent fix so depending on how they tested the set it's possible they may never see the problem. I have video evidence though

 

[derekullo]

Can you test the computer with a different tv if you have one handy, preferably a different model tv?

I've been using my current 37 inch Samsung for about 4 years and never had these problems.

 

[unplanned bacon]

Can you test the computer with a different tv if you have one handy, preferably a different model tv?

I've been using my current 37 inch Samsung for about 4 years and never had these problems.

I have one (an LG) available which it was running on for years. No issues. It did at the beginning occasionally have the issue of the screen being shifted to the right or sound not working, but a reboot would fix that. My computer had all sorts of problems that year, but that permanently fixed itself and the TV has no problems with any device. It is 5 years old though so it's showing signs of being erratic now.

TV downstairs, different model Samsung. No issues. There was one time where Project Cars' picture randomly disappeared. Though that TV has had issues maintaining a connection to everything that's been plugged into it, but that seems to have resolved itself. Super rare issue though that it wasn't really worth looking into whereas the 6400 in the video is chronic and weird enough that it needs looking at.