Vertical lines White vertical lines wherever text is shown

If you wish to get some details; visit the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

Rarely does anything good from a dropped laptop. Does it have the same issue if connected to a External Monitor? You can disassemble the laptop and search for loose connections on the motherboard/graphics adapter, screen, etc. That would be a start.

There will be something covering a small patch of the laser mirror. Find the laser mirror inside the machine (Normally above where the cartridge sits) and wipe this with a clean cloth. Other than taking the cartridge out there is no dissassembly required.

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This could be a poor connection with the LVDS cable which runs from the main video processing board to the screen, or a fault within the video processor on the main board. Worst case scenario is it could be a fault with the screen itself.

See Charge roller my be dirty or Catriges PCU Units

Have you tried calibrating the print head? Turn off the printer and the controller. Turn the printer on. Once the process light turns off, hold down the exec button and press the left arrow. "Please wait" is shown on the screen, and after a while it starts making noises and the screen changes to "calibrating". This is supposed to solve that problem. It didn't for me, but it's a start.

try to restore ur fone manually.
that should work

Either the drum and/or developer is scratched or has a line on it ..

YOU NEED CHECK THE 3 CRYSTALS ( RED, GREEN AND BLUE). CLEAN IT WHIT "DUST REMOVER" ( compressed gas duster) AND REPLACE THE COLOR WHEEL.