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01-20-2022 08:56 AM
There is a 1/8" wide band at very bottom of the screen that cycles (disappears, reappears) every 3 seconds, showing a slice from top of screen. Doesn't matter whether on HDMI or MHL/HDMI, doesn't matter what operating system running in the attached device.
01-22-2022 03:12 PM
Same monitor --> same results. Therefore, it is the monitor that has a problem.
Can you use the OSD (On Screen Display) buttons to either:
1. "reset" the monitor to factory settings;
2. adjust the VPOS (vertical position) of the monitor "downward", to push that "bottom-band" downward, until it reappears at the same of the screen?
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01-22-2022 03:23 PM
The only mention of OSD in the main Menu is "OSD Control", and there is no mention of VPOS in that menu. There is a Factory Reset under the Management menu item - did that, no change. There is an OSD Size menu item under OSD Control, and on that screen the choices are Auto, Normal and Large. Tried all, no change with any of them.
Firmware version AMM131
01-22-2022 06:31 PM
However, for your monitor, the "painting" is being done incorrectly -- maybe "duplicating" some group of rows from the "video-buffer".
So, given that your monitor is failing when connected to many computers, your monitor is failing.
There is nothing you can do, except, if the monitor is less than 12 months old, contact HP Support to make a claim against the warranty, to get it fixed/replaced, at HP's expense.