Chosen Solution
A red line flickers on the screen frequently.
But it doesn’t appeare on white background
(Red lines appear over the dark region. but the white lights works properly) Can someone provide a guide to fix it in HP All-in-one 20-r141in
This is probably a bad ribbon cable or the ribbon cable has come out of the holder a little. either way first step is usually to reflow the solder by just touching it with a solder pen to melt it and move to next one. check that it is plugged in flush with the locking connectors. If this doesn’t fix it you may have to replace the ribbon if posible or if not buy a new screen from aliexpress or alibaba
