HP LaserJet MFP M232 – M237 printers – An ‘rd’ error displays on the printer control panel

[stefan1919]

HP LaserJet MFP M232 – M237 printers – An ‘rd’ error displays on the printer control panel

- unable to connect to the printer

- disconnect and reconnect the USB cable does not help

- disconnect and reconnect power cable does not help

[Max3Aj · Accepted solution]

@stefan1919, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 
The ‘rd’ error on the control panel of your HP LaserJet MFP M232–M237 series printer (including the M234dw) typically indicates a firmware issue that prevents the printer from responding. Here's how you can resolve it:

Connect the Printer via USB:

• Use a USB Type-A to Type-B cable to connect your printer directly to your Windows PC.
• If the USB port on the printer is covered with a sticker, remove it.

Download the Firmware Update:

• Visit the official HP support page: HP Software and Driver Downloads.
• Enter your printer model (e.g., HP LaserJet MFP M234dw) and click Submit.
• Under the Firmware section, download the latest firmware update file. 

Install the Firmware:

• Run the downloaded .exe file.
• Select your printer from the list and click Send Firmware.
• Wait up to 3 minutes for the update to complete.

Restart the Printer:

• Turn off the printer, wait until it fully powers down, then turn it back on.

If the error continues after the firmware update, then please visit the nearest HP authorized service center, the service team will check and assist you. 
Kindly follow this link to locate the nearest HP service center: HP® Service Center Locator - United States | HP® Support
(Select the country from the dropdown menu and enter the city name or pincode) 
 

I hope this helps. 

Take care and have a good day. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Select "Yes" on the bottom left to say “Thanks” for helping! 

Max3Aj

HP Support