Help with HP 15c

[lyuka]

Hi, edwincool2
I'm glad to hear that.

The sticky feeling may be that sugar or something is on the switch putton. If you can input normally, there may be some gum in the plastic button from the front side.

When a number key of my 15C went sticky, may be due to a drop of soft drink, I used a small oil-paint brush dipped with small amount of rubbing alcohol from the front side to clean the gaps in the button and the panel. The dirt on the brush was wiped off with kitchen paper, and then cleaned with a small amouint of alcohol again. After several times of brushing the sticky condition was eliminated.

If it is difficult to register a key, contamination to the contacts is suspected, so add a very small amount of solvent -- try with absolute alcohol first -- from the through hole on the back of the contacts and gently blow it off with gus duster.
If you've tried it several times with ethanol (or isopropanol) and it doesn't work, then try using a small amount of xylene-based parts cleaner.

In the current situation, I don't think it is necessary to use lapping film, and the risk of ultrasonic cleaning is too high, so it is better not to do it.

Good luck
Lyuka