I have brown horizontal lines which appear on my monitor sporadically. This problem is getting progressively worse. I have tried moving the phone and all other electrical appliances which are near the monitor, but nothing seems to reduce the problem. I have brown horizontal lines on my monitor all the time and sometimes it takes over my whole screen and I can't see anything.
I had the same problem. I fixed it completely today. The horizontal lines disappeared. IT IS DEFINETLY THE DEVICE DRIVER. I confirmed my monitor model tyope (dell M783s) and downloaded the specific driver for this monitor.
I had to do these exact steps or did not work.
1) with the problem screen, disabled the display adapter under the Hardware/Device Manager settings.
2) Restart the PC
3) Boot will come up with brown lines still but the screen will low resolution of 600x800.
4) Then I installed the correct device display monitor driver onto the pc. ( you may need to scan for new hardware, then choose the directory with the new hard drive.)
If you need step by step... just reply back.
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