Monitor or Video Card Failing -- Which?

  • Thread starter Thread starter jim evans
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jim evans

About a month ago my monitor started going through periods where the
screen jitters and lines roll through it. How can I isolate whether
this is the monitor failing or the video card?
 
jim evans said:
About a month ago my monitor started going through periods where the
screen jitters and lines roll through it. How can I isolate whether
this is the monitor failing or the video card?
Click to expand...
Plug your monitor into another computer.
(You must know someone who`ll help ?).
 
In alt.comp.hardware.pc-homebuilt jim evans
About a month ago my monitor started going through periods where the
screen jitters and lines roll through it. How can I isolate whether
this is the monitor failing or the video card?
Click to expand...

Most likely it's either a failing electrolytic capacitor or poor solder
connection in the monitor.

The way to find out whether card or monitor, is to try a replacement
temporarily for either.
 
You have to replace one or the other with a known working one to determine
which is at fault.
 
I think I've figured out a way to isolate between monitor and card on
my own computer.

When I press the adjustment button on the monitor the display the
comes up (brightness, vertical size, etc.) is produced by the monitor
itself -- not the computer. Also, on bootup the DOSlike screen that
appears (motherboard and bios data, memory check, etc.) does not use
the video adapter.

So, when the jitter starts I pop up the monitor adjustment display and
if it jitters it's the monitor. Then I reboot and pause the startup
process while it's showing the bios data. Again if it jitters it's
the monitor. But in this latter method it must jitter almost all the
time, and mine is intermittent. It may jitter for a minute or so and
then go away for a couple of hours. So the first method is preferable
because you can see the part of the screen driven by the card and at
the same time see the one supplied by the monitor.

If this analysis is correct the monitor is the problem.
 
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