Flickering display

  • Thread starter Thread starter kevin
  • Start date Start date
K

kevin

When I am using my IBM T21 after about 20 mins the screen
brightness begins to flicker. It is usually okay if I have
it running but not using the keyboard. Also if I connect
an external monitor the display in the monitor is perfect
while the thinkpad screen still flickers. It happens every
time I use the computer not just now and then. I would
appreciate any input you can give me on this as it is
driving me mad ! Thanks
 
Might possibly be the actual LCD screen is having problems, the fact that it
doesn't happen immediately, but only after a period of 20 minutes would
suggest it might be an issue with heating, possibly around the area where the
screen connects to the laptop body itself.

Next time it is happenning, just check the temperature of the bottom of the
screen, if it is quite warm to the touch, this might be the case. Possibly
get in contact with IBM themselves, and hopefully the laptop will still be
under warranty.
 
Thks for your response. Checked out your suggestions. This
T21 is out of warranty so I am trying to fix or at least
localise the problem myself as I have technical
background.
There is no evidence of overheating at bottom of LCD. It
is same as a friend's T23 in that respect. Also it is not
totally time dependent because when I leave it booted up
and don't touch keyboard it stays steady indefinately.
Ironically though when I have an external monitor there
is no flickering on monitor with using the keyboard.
This is a difficult one !
 
kevin said:
*When I am using my IBM T21 after about 20 mins the screen
brightness begins to flicker. It is usually okay if I have
it running but not using the keyboard. Also if I connect
an external monitor the display in the monitor is perfect
while the thinkpad screen still flickers. It happens every
time I use the computer not just now and then. I would
appreciate any input you can give me on this as it is
driving me mad ! Thanks *
Click to expand...

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Kevin, when you have the flickering does your Fn-home or Fn-end chang
the brightness?

I have the same problem on a Thinkpad 2621-460; the display can be O
on a particular bootup and Fn-Home / Fn-End will adjust brightness
like it's supposed to. But on another boot it starts flickering a
random and the brightness keys do not work at all. Also, occasionall
the lamp on the left side of the screen does not go on. All this seem
to be getting gradually worse, i.e. the percentage of boots that hav
flickering is getting higher.

Screen bezel is warm at bottom center but I think it's always been tha
way.

If you find a fix I would like to hear what it was.

Dave
(e-mail address removed)


-
dwaso
 
Sounds like a problem with a hardware connection to the backlighting.
Try asking IBM support.
 
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