20 Most Recent HP LaserJet 2550L Printer Questions & Answers

Delete the printer, then reinstall it,

might need to replace the chip

go here

There are only 4, which cartridge won't install?

Now this is a good one. There are a lot of possible answers so I will just give the basic ones. The cartridges might be having problems you can check to see if they are all the same brand, the Carousel or Carousel Motor could be bad. The Formatter(controller) Board could be going bad. Your best bet would be to get a technician to take a look at it.

You may download a copy of the manual at http://www.olympusamerica.com/files/oima_cckb/SZ-10_SZ-20_Instruction_Manual_EN.pdf

You need a tech manual for the process. I would try Feedroller.com for the techmanual. It is rather involved.

You need a new toner cartridge.

If the color cartridges and Image transfer kit are good then you should check and clean the Laser Engine or replace the Laser Engine with new one.

The red light is indication there is an error. Reset does not solve the problem. First solve the problem, like close all doors, or replace cartridges, then try to reset by switching off and unplug from the mains. Then reinsert the mains plug and switch on again. If the red light comes back, you did not solve the problem. Read the manual, or give more details, so we can help.

http://www.toshibateccanada.com/products/BarcodePrinters/Doc/BEV4TOM.pdf Try this link to download the user manual to this device. It has all details. Gopakumar Gopalan Google

Make sure that the power is coming directly from the wall outlet. DO NOT use a surge protector.
Power off for 30 minutes. Power back on. If error returns, replace the fuser.

The main circuit board is faulty and needs to be replaced.

MAKE SURE THAT ALONG WITH THE SOFTWARE YOU INSTALL THE PROPER DRIVERS