Some keys stopped working

[MullenJohn]

Hi, My HP Prime G1 bought on 8/29/2017 does not work when pressing the following keys on the keypad: 5, 6, (multiply key), Apps.

Also cannot get it out of CAS mode.

Has something like this happened to you?

Any recommendations on a fix?

I have reset it using the small hole on the backside of the calculator?

Thank you - Cheers!

[Giancarlo]

Hello John,
It happened to me as well a couple of months ago.
I kept the Prime in my jacket for a month in order to use it whenever I had the possibility to do and it is possible that some vibrations disconnected the keyboard connector inside the calculator.

I did a back up, open the display case based on a couple of YouTube videos and replugged the connector.
In reality I didn’t notice that the connector was unplugged; probably it was a matter of fraction of a mm. However as soon as I did it it worked again as new.

The hint came from Tim. I also strengthen the keyboard screws but I was told that the issue was the keyboard connector.

Now it works like a charm again.

The previous thread is here:
https://www.hpmuseum.org/forum/thread-12372.html

Thanks

Giancarlo

[MullenJohn]

Giancarlo,

Thank you very much for your reply.

Your suggestion worked.

I went to the http://www.youtube.com video ( https://www.youtube.com/watch?v=O0dhnNFSGEQ - it was in French! ) and viewed how to disassemble the HP Prime without damaging it.

Also like you, the two ribbon cables did not seem disconnected.

The first time I tried, I wiggled the ribbon and pressed in the ribbon connectors without removing the protective clear tape over the electronics and the buttons still did not work.

In the second attempt, I removed the protective clear tape and then wiggles the wires and pressed in the ribbon connectors and then functionality returned to the buttons.

Again, thank you for your help.

I hope the ribbon cable will stay connected - Cheers!