asked Aug 30, 2009 at 10:57am
Hp HP LaserJet 4

16 TONER LOW message

This is in reference to a HP LazerJet 4.

I'm getting a "16 TONER LOW" message even after replacing the cartridge with a new one.

Yes I can live with the "16 TONER LOW" message but I can't print any output ...all I get is blank sheets.

BTW - I get no other error messages except 16 above.


First off, a 16 Toner Low message will not cause blank print. You've left out details like "is this a new or remanufactured" cartridge? Did the blank print start with the "new" cartridge? Did you try reinstalling the old cartridge to see if it printed OK?
The sensing for the "low toner" is done through the metal rod on the bottom left of the toner cartridge. It contacts some metal fingers in the printer to the HV power supply below. Could be bent fingers, could be a defective HV power supply. Reply to above questions and we'll go from there.
by moe on Aug 30, 2009 at 11:11am Add comment
I'm using a new (HP) cartridge. And I did replace it with my old cartridge (also purchased new from HP) but have same results.

I'll try my best to identify the "fingers" and determine if they're bent.

(I hope the solution was found long ago but just in case:) Regrading the "toner low" message and not being able to print: Check the printer configuration sub-menu from the printer panel and make sure the item for "Toner Low=YES". This tells the printer to keep printing even though it is low on toner. If set to no the printer stops printing at some pre-determined low toner level.
by Lynx-SD on Aug 20, 2014 at 7:00pm Add comment
I have a 20+ year old HP LJ4 for personal use and it has always performed great. I am troubleshooting the infamous "Error 16, Toner Low" message that persists even after replacing the cartridge. I've done all the steps suggested in the service manual but it still displays the message. The last suggested troubleshooting option states to replace the HVPS. I don't know if I go that far but I am having a hard time determining the correct part number for the power supply. HP only acknowledges part number C2001-69007. All the other sites offer a replacement power supply use the prefix RG5-. I have seen RG5-0531; RG5-0971; and RG5-1933 for sale on ebay and other sites. They all appear to be the same power supply but I want to be sure to order the correct part. Any ideas?

by Lynx-SD on Aug 20, 2014 at 7:07pm Add comment