8 Oct
2009
8 Oct
'09
8:30 p.m.
On 9 Oct 2009 at 6:14, Alexandru Lovin wrote:
My oldest machine is a Goldstar Gold Note 386SX 20 MHz
with 2 MB of
RAM. I'd like to do many things with it, but no matter what I try to
do, at some point the screen starts going dark and then bright and
then dark again...varying in brightness until you can't focus on what
you are doing anymore. It's a grayscale LCD. Apparently no dead pixels
at all. I've been told by someone who fixes motherboards and other
things for a living that it's not the screen but something else.
However, the man claims he has no time to look into the machine and
find the problem.
Is this a backlit screen? If not, then you may want to check out the
LCD bias supply. Sometimes there's a contrast control pot on the
bias supply and that could also be going wonky.
--Chuck