Keypad on HP8600 printer doesn't display correct letters - for instance, I press p, and o appears

[Bella38]

Keypad on HP8600 printer doesn't display correct letters - for instance, I press p and o appears on the screen. I can't input my wireless router address as the keypad isn't working properly.

[Jay_G24]

Hi @Bella38,

I'd like to help!

Let's try a power reset on the printer

Reset the product

• With the printer turned on, disconnect the power cord from the rear of the printer.
• Unplug the power cord from the wall outlet.
• Wait at least 60 seconds.
• Plug the power cord back into the wall outlet.
• Reconnect the power cord to the printer.
• Turn the printer on. HP recommends plugging the printer directly into a wall outlet.

Try updating the printer's firmware - HP Printers - Updating or Upgrading Printer Firmware

You may also, watch this video on how to enter the password-https://www.youtube.com/watch?v=rmWuV1gXkfg

Refer to -- Wireless connection is lost after router or network settings change 

If the issue persists, you could set up the printer via USB  and then convert it to wireless

Refer to - Changing from a USB to a Wireless Connection

Hope this helps! Keep me posted. 

And, Welcome to the HP Support Community. 

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