I bought a HP LaserJet 4200 used off ebay a couple months ago. Ever since I bought it, the toner has barely transferred to the page (very very light print out). Also, randomly on the page, the toner gets concentrated on the page and prints in a solid black (but very squished). The toner cartridge isn't the problem as I've replaced it twice. Does anyone have an idea what might be wrong with it?
1) The contacts on the toner/drum cartridge are not making good contact with the printer itself. There should be small springs inside the printer where it makes contact with the toner cartridge, make sure none of those are bent or missing, look for bent springs, missing springs, etc. 2) The transfer roller is damaged(a large sponge looking roller, about 9 inches long, that sits right under the toner cartridge, you won't be able to see this roller without pulling your toner cartridge out), 3) There is a problem with the power supply not providing the correct voltages. The transfer roller, and the contacts for the cartridges are two things you can visibly check, but if you do both of those, and don't see any problems, you will probably have to take it to a service location that will have the tools to check the power supply, and replace if necessary.



Keywords: printing problems

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