Common Early HP LaserJet Error Codes

When working on older printers you will often encounter cryptic error codes. These are the most common ones I encountered on HP II and III series printers. Many of these codes have remained unchanged to this day.

Early HP Error Codes

If you have another code, and cannot find the answer, please drop a line through the Contact page and I will add it to the list. I would not be surprised if we find that codes, that were unheard of back in the day, are common now.