I have a HP LaserJet 4MV printer. Although it's an old printer, I really haven't used it very much over the years. About a year ago, it stopped printing automatically using paper from the tray. The paper is loaded correctly in the tray, but each time I try to print from the tray, it registers a "Jam". There really is no jam, but it "thinks" there's a jam. I've examined the tray, removed it, replaced it over and over, but the problem persists. I've removed part of the paper from the tray and even replaced the paper, but it doesn't help. Automatic printing from the tray just doesn't work anymore. Now the only way I can print is by manually feeding pages one at a time. Obviously, this is quite inconventient. Is there some kind of "sensor" in the tray? If so, where is it? Do you have any idea why my printer is registering a "jam" when there is no paper jam? The paper doesn't even move in the tray at all.
Good old 4MV.
paper jam is just the way the printer i stelling you "something" wrong with paper feed".
you need to locate a "4MV repair kit" , they are not cheap. but, if you wan to keep the printer, it is worth it.
http://www.fixyourownprinter.com/kits/hp/K78 cost of the ket is $50
includes Instruction CD rollers, and other repairable parts.
SOURCE: HP LaserJet 4MV
You could remove the fuser, turn the machine off, and wait an hour. It may reset the error. However, if the error still persists, it will be a parts replacement of the fuser, low voltage power supply, or the DC controller. 90% it is the fuser. Good luck.
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