Re: Hp-42s display problem Message #8 Posted by aj04062 on 26 Feb 2011, 10:03 p.m., in response to message #7 by Randy
Well, I pulled the calculator apart because as I twisted, another half row blinked on and off. I deduced, it was probably a bad connection in need of repair.
Well, I do believe it is. When I got it apart I immediately noticed green corrosion in areas near the zebra.
Well I cleaned as delicate as I could with warm water, vinegar and a q-tip. I think there are 2-3 traces that need repair. YES the corrosion is this bad, It reminds me of a 65 I repaired that had a completely exploded battery.
Anyone have a good source of VERY FINE trace repair? I think the conductive trace pen is the only way to go here, agreed?
|