When using any program that is graphical, my dell inspiron 6400 has vertical lines flash in the center or right half of the screen, then slows down and seems as if it crashes. After about two to four minutes it picks back up and slowly starts to work at full speed.

LCD back light complaint

Check on another external monitor, if the picture is ok there, eliminate a faulty graphics chip
If picture is still poor, Graphics chip is faulty

You are now left with the issue of it being the VGA cable from the mobo to the screen, or a faulty screen. It may be that you just need to have the connections checked, but also may point to a replacement screen or Cable being needed

A simple way to check also is to hook it up to an external monitor and see.
plaese tell me after chacking.

Replace the screen, they're not repairable.

the screen is bad just look for something to do about it.

I had the same problem. You need a new graphics card.

Try useing your graphics card's control panel you can find it via the windows control panel. if you have not installed your Graphics card's driver software goto the company who made the card and download the latest driver. then once the driver is installed goto windows control panel and click on the driver's control panel. Then goto desktop color corection and move the brightness slider to the right until it's bright enough.

FIRST REPLACE YOUR BATTERY, THEN ALSO CHECK VIRUS WITH AN UPDATED VIRUS CLEANER.

Try connecting an external monitor to the Dell Inspiron 9300 and see if the vertical line is also present on the monitor. If the monitor display is fine, then your laptop’s LCD display panel is defective. If the monitor also displays the vertical line, then your problem is with either the video card or motherboard located inside your laptop.
Not sure if the Compaq Presario has an external monitor plug, but if it does the above procedure can be applied to that one as well.


Your responses are intended to improve the level of service provided. Please rate your experience.
Thank You.

Could you please run the diagonistics on the computer?
Turn on the computer. When the DELL logo appears, press <F12> immediately. Select Diagnostics from the boot menu and press <Enter>.
NOTE: If you wait too long and the operating system logo appears, continue to wait until you see the
Microsoft Windows desktop. Then shut down your computer and try again.
b Press and hold the <Fn> key while powering the system on.

Make a note of any errors that you get after running the diagnositcs on the computer.