396t keypad
I haven't taken the keypad apart on a 396, but if like other electronic equipment,
conductive rubber contacts are likely used. I'd say it only takes a small amount of moisture
to bridge the contacts, would act as if a button or multiple buttons are being pressed.
I would disconnect the battery and give the scanner plenty of time to dry out, I probably
wouldn't go so far as to putting it in the oven, but I'd put it in a warm place, give it some
time, will take a while because it will be difficult to get air in that area inside the switch.
Give it a few days, connect the battery and try it again. Worst case, may have to replace
the keypad. I don't know how difficult it is to get to it, have never taken a 396 apart.
The problem leaving power attached, the dc voltage can cause electrolysis and therefore
corrosion on the contacts, causing permanent damage.
Try giving it a chance to dry out and let us know.
For times like this, I wish I had a bell jar, like in physics class, to draw a vacuum, would
dry things out instantly without heating or warming.
Jim H.