08-13-2007 06:16 AM
08-13-2007 06:26 AM
02-19-2008 03:00 PM
01-24-2009 01:57 AM
Then I found another thread regarding the same topic, which said that it could actually be a paper jam which messes up the sensor. I checked, and that indeed was the problem. There was a sheet that was just partially fed in, so it was easy not to notice. After removing the sheet, no more problem.
Seems that the error message can be misleading sometimes.
02-05-2009 08:56 PM
Sad that HP didn't formally respond to this thread. I'd expect better from HP.
02-14-2012 12:49 AM - edited 02-14-2012 12:51 AM
There isnt a flag sensor for toner in laser printers.
Toner is sensed by a combination of things, if the cartridge has an E-label then it reads that, also it detects current drawn from the high voltage through the developer - the toner is conductive as it contains magnetite.
The first detection is the current drawn, this provides cartridge detect signal.
Inside the cartridge there is a small flat plate, this picks up the current passing through the toner, providing a signal to the toner level sensor, this provides toner level sense.
All of these depend on one thing, the drum must have a good earth - the white lever your playing with engages the earth, no earth = no cartridge detect, no toner detect.
The flag being mentioned in the interim posts appears to be the registration flag, this is a different fault so try to focus on your particular issue and not divert.
If there is media present, a power cycle is always first - the printer should try and flush any media,if not always remove media in the direction of travel, pulling it backwards can and will damage flags.
Apologies in not seeing this post sooner, I would have responded.
(Don't forget Kudos if people have helped)
02-18-2013 07:19 PM
by jayman. To fix the no cartridge problem first pull the feed paper back as some may be in the way of the white lever having tension on it. It must kick forward not just flop back and stay.