HP-15C Not Powering On .... Mostly

[whirligig]

(11-07-2021 06:35 PM)Dave Frederickson Wrote:  The chip looks like it still has some corrosion. Try starting with white vinegar to dissolve the corrosion. Then water to neutralize any acid left over from the vinegar. Then alcohol to final clean and help any left over water to evaporate. Dry with compressed air.

Thanks Dave, I followed your instructions. I can see that vinegar does a more thorough job than denatured alcohol. It's drying now then tomorrow we'll see.