Waves and color grains on LCD monitor

I have a Compaq SR 1931 IL(Windows 7 OS) model desktop pc. It has a 3gb RAM and 64MB Video card(inbuilt). No dedicated graphics card installed. After I installed my LCD monitor(DELL) I have these color horizontal grains, and horizontal waves moving vertically. I changed my monitor, but the result was the same.
I connected my monitor to another desktop(it has dedicated graphics card), there was no grains or waves.
tried my own VGA cable with the other desktop, still no problem.
what can be the issue here, mostly people say its the VGA cable's fault. Should i try another cable with my compaq desktop? It was originally commissioned with CRT monitor.

From your description it would lead me towards either replacing the motherboard or adding a PCI Express x16 basic video card (without the requirement of a six-pin PCIe power connector).
I suggest a basic card because it is very unlikely that your PC came with more than a 300 Watt PSU. Considering the date your PC was introduced to the market, it is also unlikely that the PSU was delivered with a six-pin PCI-Express power connector.
Best regards,
erico
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

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Go to Solution.

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Message Edited by davidhbrown on 04-21-2008 09:36 AM
[Edit 2]
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Message Edited by davidhbrown on 04-21-2008 09:47 AM

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