aathan
asked on
Video Jitter
I'm wondering if others out there have seen problems similar to what I am experiencing with a new HP Pavilion 753n. I have the machine's onboard video controller hooked up to an NEC MultiSync LCD 1525M monitor (analog) at 1024x768.
Every time the machine is working hard (e.g., during a CPU benchmark) or when the hard disk is being accessed, the video jitters. Sometimes this is visible only in areas of fine detail (e.g., around text) and sometimes it is a broader effect over a larger portion of the display.
I have done an "auto adjust" on the LCD monitor several times, and have also used an alternative LCD 1525M. I have not tried a different brand of monitor.
The problem is worse at 75hz and 70hz refresh; the video card is currently set at 60hz.
Do you think this is indicative of marginal video hardware, and that I should take advantage of warranty service on the unit?
Have others seen this type of problem and can you share your experiences?
Do more recent LCD monitors support faster refresh rates, and do you expect that a faster refresh will avoid this problem?
I went so far as to shield all of the drive & other internal cabling in the PC with tin foil grounded to the chasis!!! This improved the problem somewhat.
Every time the machine is working hard (e.g., during a CPU benchmark) or when the hard disk is being accessed, the video jitters. Sometimes this is visible only in areas of fine detail (e.g., around text) and sometimes it is a broader effect over a larger portion of the display.
I have done an "auto adjust" on the LCD monitor several times, and have also used an alternative LCD 1525M. I have not tried a different brand of monitor.
The problem is worse at 75hz and 70hz refresh; the video card is currently set at 60hz.
Do you think this is indicative of marginal video hardware, and that I should take advantage of warranty service on the unit?
Have others seen this type of problem and can you share your experiences?
Do more recent LCD monitors support faster refresh rates, and do you expect that a faster refresh will avoid this problem?
I went so far as to shield all of the drive & other internal cabling in the PC with tin foil grounded to the chasis!!! This improved the problem somewhat.
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I suspect you're using "shared memory" for VGA ( as this is onboard display) which is normally the case, with onboard display. You might need to increase the amount of shared memory in the BIOS ( CMOS )