HP 15C CE key bounce

[Rick314]

(07-09-2024 04:56 PM)Rick314 Wrote:  I am now on my 4th unit with excessive key bounce:
Lot number 9CJ323, serial number 03528, new, eBay, eldoradotrading, returned.
Lot number 9CJ323, serial number 03553, new, eBay, eldoradotrading, returned.
Lot number 9CJ323, serial number 03930, new, eBay, samsoncableshpcalculators, returned.
Lot number 9CJ351, serial number 13105, new, https://hpofficesupply.com.

I recently received a free HP Programming Cable from HP Office Supply (hotline@royal.com, image below) and was able to update my HP-15C CE firmware to checksum "ChE--0A0Ah", "2024-06-03", "C 2008 hP". The key bounce problem is significantly improved! Regarding the calculator their HP-15C CE website currently says "sold out" and "no current plans to restock it". Getting the cable and instructions from them for my in-warranty unit involved sending 10 emails and receiving 7, from 6/28/24 to 9/24/24.

It is worth notice that the firmware update instructions include "Although the procedure has been tested and so far, no calculator has been bricked, MORAVIA Consulting spol. s r.o. is not responsible for any damage that happens to the calculator!"