LC49HG90DM LXZS power-up glitch

[Marcelo Ibarra]

Hello,
My LC49HG90DMLXZS is unusable. At power up it shows a black screen and then vertical colored lines (photo attached). The fault manifests itself even with no video input connected to the monitor.

The installed firmware is m-HG949CCAA-1021.0 downloaded from:

https://www.samsung.com/mx/support/model/LC49HG90DMLXZX/

Please guide me how to solve my problem

Greetings, Marcelo

[SquishySenpai]

Did this happen immediately after a driver update? If so then try an older driver. If this just popped up out of nowhere, I fear you may have a hardware issue.
If you try to bring up the on screen menu built into the monitor how does it look?

[Marcelo Ibarra]

Indeed, the problem was generated after installing the new firmware.
I can't go back to a previous version because the  screen menu built into the monitor is not visible.
I have two identical monitors. I updated the firmware on both and only one has the problem (photo).

[SquishySenpai]

Is use of the on screen menu required to do the roll back?

[Marcelo Ibarra]

I can't roll back because the  screen menu is not visible.