ROG Maximus Z890 Extreme LCD Panel glitching

[Ppsych]

Hi there!

I have already seen one post about glitches on the MB LCD panel, but I couldn't have answered because the post had been already closed. In a nutshell: some days ago I started noticing strange ghosting in the lower part of the LCD that started to appear usually after a couple of minutes of the PC activity. Sometimes, perhaps if the system have reached slightly higher temperature, the ghosting doesn't disappear even after reboot, power draining the system or resetting the BIOS. Strangely enough the onset of glitching coincided with the TBT firmware update I have made recently. Displaying static images makes sometimes the entire LCD unreadable. As Camo81 noticed (https://rog-forum.asus.com/t5/intel-800-series/z890-extreme-5-display-problem/td-p/1073086) maybe it's a simple fix, or is it just a physical failure needing RMA. 

Greetings,

Paul

[Ppsych]

I was able to isolate the erroneous LCD behavior to the effect of system temperature. As long as the system is freshly started and cold, nothing happens. Warming it up evokes display errors. Further warming e.g. by stressing system with software that makes CPU power section warmer causes the screen glitches to disappear. They reappear when the stress is off and when system is cooling down. I managed to successfully replicate this behavior a couple of times so I think a sort of physical (perhaps soldering) defect is to blame. I therefore sent the MB for RMA.