29 Oct
2022
29 Oct
'22
1:15 p.m.
One thought is that the brightness control might be heating up and changing value. You can
check the controls easily with a ohm meter. Check ohms across the control when cold,
disconnect ohm meter and plug in the machine until it goes white. Then disconnect and
measure across the control again.
Sent from my iPhone
On Oct 29, 2022, at 13:05, Cameron Kaiser via cctalk
<cctalk(a)classiccmp.org> wrote:
Is there any kind of brightness control? Does it work at all when the screen goes white?
There are brightness and contrast controls, but they don't seem to do anything
even when the screen is working properly. (Note that this could simply be an
issue with the physical controls themselves rather than the display
controller.) Likewise, when the screen goes white, turning down the brightness
(or upping the contrast) does nothing; the screen remains blank bright white.
The CCFL backlight is unchanged and fully illuminated.
--
------------------------------------ personal: http://www.cameronkaiser.com/ --
Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser(a)floodgap.com
-- I thought his Markov chain needed oiling. -- Mark J. Blair -----------------