58.4 Power Supply Error in the HP LaserJet M5025 Multifunction

I was recently called out to work on one of  a HP LaserJet M5025 multifunction printer (MFP) the other day, which had the 58.4 error happen over the weekend. When the customer came in Monday morning the error was on the screen.  I recommend these steps to troubleshoot:

  1. Turn the machine off
  2.  Make sure it is not plugged into a surge arrest, power strip, or battery back up
  3. Let it sit 20 to 30 minutes unplugged
  4. Plug it back in and try again.

If the problem still occurs then the next step is to call a service technician for further troubleshooting. On this particular MFP, the above steps did not fix the issue so I was called out to perform a diagnostics of the unit.

I arrived onsite and started troubleshooting the machine. Upon turning on, the display was dimly lit but it proceeded to go through the memory and initializing steps for several minutes before it finally displayed the 58.4 Error. The formatter heart beat light was on and blinking and the machine would not perform an engine self test. None of the fans or motors inside the machine came on so I knew there was either a power supply or DC controller issue.

After unplugging the unit and  removing the LVPS (low voltage power supply) from the back left corner of the machine, I noticed that the LVPS smelled burnt.  However, both of the glass fuses on the board tested ok. Upon further study I noticed that the part labeled IC101 had burned up. I ordered and installed in a new LVPS and the problem was fixed. Use the link below to order the HP LVPS printer part.

Low-voltage PCA assembly (110V-127V) RM1-2994

Kevin Gumpp is a certified printer technician and freelance writer for Market Point. Market Point is a HP PartsOne Partner selling HP printer parts. If you have a question regarding this topic or have any other printer repair related questions or topics for which you would like more information, please send an email to maryp@marketpoint.com.

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