Question about Compaq Presario 2140US Notebook

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Bad connection between laptop and lcd projector

When I connect an lcd projector to my laptop, the picture on the laptop itself is fine, but the one on the lcd display is fuzzy at best and sometimes blanks out giving a "searching" message. If I wiggle the connection on the laptop I can usually bring up the lcd display again, but the picture quality is poor.

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I am using an LCD projector Epson and keeps on breaking down. supplier will insist that PC is causing the damage. Is there a posbility that incomplete connections in the cabling will cause breakdown, missing grounding maybe in Hor-vert sync? Or can it really be the PC? The PC normally sends video/sync signals only. I dont know if it sends a destructive signal to the LCD cpu to get damaged.

Posted on Mar 17, 2008

  • Redentor Rivera Mar 17, 2008

    you can try to set your laptop resolution to the lowest and see if your LCD will work normal. as what cramsvik said, the fact you got your LCD functioning when you wiggle your conections, that is a sign of bad contact. But not in all cases, when you sometime lossen your contacts like in your horizontal-vertical sync, it could trigger a signal to your LCD to show image but eratic. Could also be your sync signal that's why reducing the resolution lower will probably help. set your monitor display setting frequency to lowest too.

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First, check all plugs and make sure there are no broken or bent pins in them. If the projector you are using have a replacable cable try to replace it to see if the cable is the problem. (borrow a cable from a friend or relative first so you don't buy one if it is not needed.)

If that doesn't fix it, try to connect a different computer to your projector to see if that is better. If so, the output port on your computer may be bad.

Also try to hook your compuber to a different monitor to see if that works. If no computers are able to make a good picture on your monitor, the monitor is at fault.

The fact that you can change the picture quality by wiggling the cable, and that it starts to search for a signal suggests that the cable or the plugs are at fault, but having the wrong resolution set up on your computer may also affect the image quality. Again, try to use a different computer as a source to eliminate (or confirm) your computer being the problem.

Posted on Feb 19, 2008

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