@MaestroLmpio, make sure you have proper firmware for your printer. Here's a firmware for foo2zjs which is known to work.
https://files.catbox.moe/exvp45.dl
Rename the file to sihpP1005.dl and put it to /usr/lib/firmware/hp/ and uninstall hplip to not interfere with the loading procedure.
To...
"SPD" tab in CPU-Z only reads the information provided in the RAM module's EEPROM chip, directly.
You've inserted 2400 MHz RAM which does not have SPD profile for lower frequencies, while your laptop expects 2133 MHz RAM.