Why is line flashing on monitor?

Line Defects On Vizio TV Screens

there are several reasons why picture of crt monitors did not display good picture. if your monitor had horizontal line at the center of the screen?...the faulty is in the vertical deflection, check the vertical oscillator also the fusible resistors & capacitors around that section. if there had vertical line at the center of the screen?..check the horizontal deflection, horizontal output transistor also check the YOKE.

Hi There and Welcome to Fixya.

Horizontal or vertical lines flashing/running across the screen poses serious display issues with any LCD/CRT monitors. It only boils down to 2 possible causes :

• Corrupted video driver
• Hardware issue

To help you determine which of the above, here's what you need to do.

• Ensure that the computer is turned OFF
• Disconnect ALL USB devices except the keyboard
• Turn the computer on and immediately hit "DEL" (in some systems, it's the "F2") key repeatedly until you reach a different screen. (not the usual Windows screen)
  
• Welcome to the BIOS screen
• From here, spend 30min to 1 hour observing if the lines are present in this mode

If you still see the horizontal lines, then there's a need for the monitor to be serviced by a certified/trained technician. The link below will direct you to their support page for repair/replacement options, depending on your warranty status :

ViewSonic Support

Otherwise, the problem can be resolved by re-installing the operating system.

I hope this helps, Thanks for using Fixya.

See this FixYa link.

picture tube needs to be replaced

Problem with Interface board or panel.
Also maybe due to defective powersupply filters.
Samir

turn the power off to the monitor for 30 50 minutes buy the power point then back on let me know how that Geo's it should reset the monitor

This sure looks like a CCD image sensor failure. If so, you can't fix this yourself. If the camera is less than a year old, Canon will fix this for you under warranty. Call 1-800-OK-CANON.

get new batteries, if recharging your current batteries does not work (to stop it shorting out).

reduce your shutter exposure, by changing to Manual Mode (M), selecting +/-, and then the left button (flash) around the Menu OK button. Mine works fine at 1s shutter speed, but was showing horizontal lines before that ...

I have seen this B4 here is a link that may help. http://www.wikihow.com/Fix-a-Stuck-Pixel-on-an-LCD-Monitor