Re: LASER JET M601 (2340 Views)
Frequent Advisor
Posts: 225
Registered: ‎02-11-2009
Message 1 of 5 (2,679 Views)


Could anybody help me out withthis error code 49.23.cb. on this laser jet m601.



Valued Contributor
Posts: 389
Registered: ‎07-09-2012
Message 2 of 5 (2,666 Views)


Hello have you tried a firmware update? Usually that would fix many of the 49 error codes. Check for the latest firmware update, also I would power down the machine disconnect from the network and power on see if the error goes away this way you can rule out if it was a corrupt file or something.


Hope this helps....

HP Pro
Posts: 3
Registered: ‎09-09-2013
Message 3 of 5 (2,360 Views)




Another resolution for the 49.23.CB issue is to reseat some of the cable connections however a technician would be needed for this. Please contact HP customer support 800-474-6836 for this issue.

Thank you

HP Pro
Posts: 1
Registered: ‎09-10-2013
Message 4 of 5 (2,347 Views)



This crash occurs beacuse the Formatter board is not connected properly to the engine board behind.

Please re-seat the formatter board firmly in the engine and try again. this will surely fix the issue.

Also please update the printer to the latest Firmware from to make sure you have all the latest fix for your product.




I work for HP
HP Pro
Posts: 21
Registered: ‎05-05-2013
Message 5 of 5 (2,340 Views)


Most commonly, 49 errors occur when a product is asked to perform an action that the product firmware is not capable of and might not have been designed to comply with, such as:
  • Printing files with unsupported programming commands.

  • A unique combination of user environment and user interactions with the product.

  • Interfacing with a third-party solution that was not designed to work with the product.

  • Specific timing, network traffic, or concurrent processing of jobs.

Each of these interactions could cause the product firmware to initiate an action that the product cannot accomplish. In situations like this, the product might present the error if it has no other option. When these errors occur, the only way to recover is to turn the products power off and back on.


Please follow the following steps to resolve the issue :


Step 1)Verify that the formatter light is blinking or steady. If the formatter is blinking, it is functioning properly and probably does not need to be replaced. If the formatter light is not blinking, proceed to Step 2. Step 2 >Turn off the printer and unplug the power cord. >Remove the HP Jetdirect card, third-party device, hard disk, parallel cable, or IFR cable from the formatter if one is installed. >If the error continues with accessories removed from the formatter, perform a cold reset on the printer. Ensure the HP Jetdirect card is not in the printer during a cold reset or the card settings will be changed back to default settings. To perform a cold reset, do the following: >Turn on the printer. >Watch the control panel. >When the memory starts counting, press and hold the green (Select ) button. >Continue holding the green check button until the Ready, Data, and Attention lights flash once, and then stay on steady. >Release the check button when the Ready, Data, and Attention light are on steady. >The control panel will display SELECT LANGUAGE . >Press (Down Arrow ) button once. The control panel will display COLD RESET . >Press (Select ). The printer will perform a cold reset and then continue its power-on sequence. If the printer comes up to ready, print a Configuration page. If a 49 error occurs from printing internal pages, continue on to the next step.
Step 3 >Turn the printer off and unplug the power cord. >Remove the eight screws around the formatter. >Remove the formatter.  >Reseat the firmware and memory modules on the formatter. Check for any DIMMs that are non-HP and remove them. Non-HP DIMMs are not supported by HP and may cause this error. Replace with HP DIMMs, if necessary. >Install the formatter. >Turn the printer on again. >If it comes up to READY , print a configuration page. If a 49 error does not appear from printing internal pages, or at power up, continue to the next step. Step 4 >Install the HP Jetdirect card and hard disk before installing the formatter. Verify that each device is properly seated. >Test any EIO devices, by turning off the printer, installing each device separately, and printing a Configuration page. Repeat for each EIO device. >If the 49 error occurs with any EIO device installed, replace that EIO device.


Kindly check the firmware date code & version from the configuration page and if required please upgrade it to the latest one.


You may check the latest firmware for your printer in below metioned link :



I work for HP in Printer's department.

Please send Kudos if you are satisfied with the suggestion.



Sohail Arshad

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