You've just saved someone, probably many someones, a lot of time and frustration. Thank you for coming back to document the fix.
--b9 On April 9, 2026 1:46:20 PM PDT, Kurt McCullum <[email protected]> wrote: >Finally had time to track this down. I'm passing this along for anyone who >might have this happen down the road. > >The contrast POT (VR1) was not the problem. The 100k resistor (R10) which is >part of the contrast circuit went bad. I took it out to measure the value and >instead of 100k my meter said 1.7meg, so 17 times what the value should have >been.. > >I can only speculate as to why, but since that resistor is right next to the >memory backup battery I think that's the key. Long ago this battery leaked >before I changed it out. Looking at R17, I could see discoloration on the >leads. > >So one small resistor was all I needed to swap out and this machine is back up >and running. > >Kurt McCullum
