HP25 keypad problems

[calc-calcs]

So since it was only 1:30am decided to open her up, and after putting Deoxit in the 4 and 5 key holes it almost instantly cured the problem. The 5 key required a second shot, but is since working reliably. Then I started testing all the other numeric keys and found that the 2 was also quite unresponsive at times, and 3 was a bit sluggish as well requiring a bit more firm press, and the divide key was a bit bouncy as well. But all now apparently cured. Also discovered that the minus was sometimes also acting two (or more) times on a single press, so that one got its D100 shot as well. Then in the end as a matter of course did all the lower half white keys, as it appeared that they might have been affected in varying degree by the former battery corrosion issue. Will now let her sit overnight and test again tomorrow (later today) and hopefully all will still be good.

But if otherwise just in case left the two feet out to spare them any additional undue stress if I have to reopen for another squirt. These feet are really gummy, and have lost their original consistency, so I try to treat them gently, and had to put a piece of magic tape on their outer face to avoid abrasion and stickiness. Its the only hp2x in my collection that has this problem, all the others are still in perfect shape. Yes I know there is a solution for the gummy feet by cutting up a piece of rubber eraser to match their shape, but so far it has not really been necessary.

Thanks again to everyone for the key restoration tip with Deoxit. BTW need to order more, less than 0.5ml left.

Quick update: after about 45 min the number two key still requires a very slightly firmer pressure than the other keys in order to work, but is not bouncing. With normal pressure it clicks alright but no action. Not sure this might be caused by the Deoxit not having fully dried yet, some dirt still in the way, or perhaps the metal dome is just worn. Will check again later during the day.