HP 15C CE key bounce

[Rick314]

(09-03-2023 09:09 AM)ijabbott Wrote:  The key bounce on my 15C CE (Lot number 9CJ323) is still really annoying*. I'm planning to return it for replacement under warranty.

* I've tried to clear the problem by pressing each key hundreds of times, which seems to have a temporary effect of reducing key bounce, but the problem recurs after leaving the calculator for a while.

Thank you for your post and I have the same situation. I received a new 15C CE yesterday and encountered key bounce over 10 times in 6 hours of use -- a double-registration of a single key press and release, for several different keys. My unit is the same lot number as yours ("L/NO. 9CJ323"). I have serial number ("Collector's Edition Number") 03528.

After seeing the problem several times without trying, I found I can replicate it by pressing the 9 key 10 times (varying angle, direction, delay, and force), then x<>y to clear the display, then repeat. It happens often enough in normal operation that I too plan to return the calculator for an in-warranty refund and order another from a different supplier.

[Uwe-001]

Same problem here, i got a 15C CE via Amazon in February 2024. Keys 8, 9 and 6 bounced nearly at each key press. I have tried pressing the affected buttons many times, perhaps to solve a contact problem. However, this was unsuccessful. As the basic functionality of the calculator is therefore not fulfilled, namely to reliably process key inputs, I have exchanged the device and received my money back.

Some time later I ordered again, this time I received L/NO. 9CJ323, CE No. 06506. This device works well. Maybe I've just been lucky now.

On Amazon, other buyers have also complained about the bouncing buttons. The manufacturer obviously has a quality problem.