HP LaserJet M2727nf MFP - PCL XL Error - is this repairable?

Question

This printer works fine offline - it copies and prints reports in duplex with no problem ... but gets an error (locks up) and no longer prints from the computer.  It has worked fine for the last year, since I purchased it as a refurbished printer from HP.  It seemed to deteriorate shortly before it failed completely.
Is this repairable... (I was able to get the following printout once, but can't figure out how I did that!)
PCL XL error:
   Subsystem:  KERNEL
   Error:            InternalError  0x7
   Operator:      Text
   Position:        1545
I would appreciate any advice as to how to resolve this problem ... including where else I could look for an answer.
Thanks for any help you can offer ... Melissa

Answer 1

Your error:
PCL XL Error
Subsystem: Kernel
Error: IllegalTag
File Name: Kernel.c
Line Number: 1921
 implies that the incoming print job includes a tag which is not supported by the protocol.
To find out just what is wrong with the print stream would almost certainly require access to the source code (specifically module Kernel.c) of the firmware in the printer - available only to HP (or whoever was contracted to write the firmware).
In earlier generations of LaserJet printer, the format of the error message (as per the PCL XL specification) was somewhat different; for example:
PCL XL Error
Subsystem: Kernel
Error: IllegalTag
Operator: SetFont
Position: 43
which could be used to discover the underlying fault by reprinting the document using 'print to file', then analysing the resultant .prn file, and finding the data associated with the relevant PCL XL Operator tag (which, in the above example, would be the 43rd operator in the print job).
Although the new format of error message is possibly more useful to HP in determining the cause of the error (their having access to the source code of the firmware), it would have been very useful to independant consultants if the original Operator tag and Position elements of the error had also been included.
If you get exactly the same error if you reprint the same document to the same printer, using the same application and print driver on the same workstation, then the fault is likely to be a driver error, in which case the only solution may be to use a different printer driver (if one is available).
If doing a reprint as per above produces a different error (or no error at all), then the problem is intermittent, and is more likely to be caused by corruption of the print job between workstation and printer; check (perhaps by replacing one item at a time) cables, ports, switches, hubs, etc.