Hi, At times the computer comes on and when adjusting the screen display the image gets all distorted and then fades away. I have checked the +5 and -5 volts that the screen needs and I get +5 and -4.8 volts respectively. I changed capaciitor ‘C85’ and checked all the memory chips. Like I said it works every now and again, missing a few lines on the screen. When i play with the contrast knob the image distorts and some times fades away. Any of this makes sense? Lol
Thank you, On Oct 11, 2018, at 11:15 PM, Brian White <bw.al...@gmail.com<mailto:bw.al...@gmail.com>> wrote: You may be able to clean it with Deoxit D5. Drench it good. Work the knob a few times a day for a few days. Give it at least a week to dry out and act normal. While the stuff is still wet, the screen may go totally blank, meaning no darkened pixels, or just microscopically faintly under just the right extreme angle of light. But by a week maybe a little more it does dry out and the pot will either be better than before, or the same as before, depending on if the original problem was dirt & oxidization or not. But it doesn't hurt anything. (plastics, traces, etc) On Thu, Oct 11, 2018, 6:57 PM Rafael Arena <minikni...@hotmail.com<mailto:minikni...@hotmail.com>> wrote: Hello, I have a semi functional Model 100. I believe the issue is with the variable resistor ‘VR1’. Where can I get a replacement? Do those VR’s typically go bad? Thank you,
