I found this on the HP website:
HP LaserJet M2727 Multifunction Printer Series - 49 Error Message Is Displayed While Faxing
ISSUE:
The printer control panel will be displaying
49 service error while sending faxes. The receiving fax will be lost, and the printer will display the same error even after reboot.
SOLUTION:
Performing a factory reset and a firmware upgrade is the only solution for this issue.
Step 1: Performing a factory reset
Restoring the factory-set defaults returns all of the settings to the factory defaults, and it also clears the fax header name and phone number.
CAUTION:
This procedure clears fax numbers and names that are associated with one-touch keys and speed-dial codes, and deletes any pages that are stored in the memory. The procedure then automatically restarts the product.
Perform the following steps to restore the factory-set defaults:
1. On the product control panel, press
Setup .
2. Use the arrow buttons to select
Service , and then press
OK .
3. Use the arrow buttons to select
Restore defaults , and then press
OK . The product automatically restarts.
Step 2: Firmware upgrade
After coming to ready, upgrade the printer firmware from the HP website. The issue can be fixed with any of the firmware upgrade available now. Firmware version 20080505 and higher versions have the fix.
You can download firmware version 20080612 from the HP LaserJet M2727 Firmware Update 20080612 webpage.
Click here to go to the HP LaserJet M2727 Firmware Update 20080612 webpage (http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=18972&prodSeriesId=3377075&swItem=ma-55531-3&prodNameId=3377076&swEnvOID=228&swLang=8&taskId=135&mode=4&idx=3) .
The preceding steps will resolve the issue.
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