15 Dec
2009
15 Dec
'09
7:50 a.m.
--- On Tue, 12/15/09, Bob Brown <bbrown at harpercollege.edu> wrote:
How do I identify which board is the
video/keyboard interface board? (I
see 4 boards in the card cage)?
How do I identify which chip has failed?
Where do I get replacements?
Thanks!
-Bob
According to the manual, the video board should be in the 4th slot from the power supply.
The back of the board has the numbers 8709048.
Assuming that the documentation here is correct, the video RAMs should be in sockets, and
are U19-22. They are 2114's. Swap the chips around in the sockets and see if you can
get the symptom to change at all - you should be able to get the messed up sections of the
screen to change. If so, then one is definitely your culprit.
As for obtaining replacement parts, I know that Unicorn Electronics has 2114's
(www.unicornelectronics.com, look under "Static RAMs")
-Ian