[comp.sys.cbm] Yet an other C64 repair problem

rickc@pogo.WV.TEK.COM (Rick Clements) (11/21/90)

I have a problem with my C64 and it's not the power supply.  The top several
lines of the display are moved to the right on the monitor.  I'm not supprised
it won't drive the TV at all.  It looks something like the picture below.
  _______________________
 /                      /
/                      /
|                      |
|                      |
|                      |
|                      |
|                      |
|                      |
|                      |
|______________________|

Any suggestions from someone who may have seen this problem before?
-- 
Rick Clements (RickC@pogo.WV.TEK.COM)

dtiberio@engws10.ic.sunysb.edu (David Tiberio) (11/22/90)

  Your TV or monitor can get "the bends" onscreen whenever the contrast is too
high. Do you have the colors set very bright? Is the black very dark and the 
white very bright? If so, this may be the problem. Simply adjust the contrast
or brightness of the TV or monitor. This is the same for all computers. :)
David Tiberio  SUNY Stony Brook 2-3605  AMIGA  Toto Productions  DDD Men

treesh@vangogh.helios.nd.edu (11/26/90)

I have seen this problem before, although Im not sure exactaly what casues
it, I can safely say its proabaly not a digtal problem.  It looks like so
me kind of forign frequency is getting into the video output amp circuits.
Perpase a bad fitler cap in the internal power supply (not external power
pack).  If you have a variable DC regualted clean power souce, apply
+12 Vdc onto the power Vcc of the Vic chip and see if the problem clears
up.

ctfm