Question about HP LaserJet 4si Printer

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Hp 4si laser jet prints the page with heavy dark toning on both edges right & left . Lately toning dark over the entire face of the page , makes otherwise good printing hard to read . The edge toning is heavy in about 1 inch from each side . Any help ?

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Re: Hp 4si laser jet prints the page with heavy dark...

Hi, When I've worked on printers with this problem in the past it usually comes from the high voltage power supply going bad. There is also a low voltage power supply that runs everything except the actual printing so your printer will still operate without any errors but the print quality will go bad. The high voltage power supply is located under the bottom of the printer and it's too hard to replace. I can't advertise for any place on this site, but if you type in the part that you need into a search engine and look for parts on everyone's favorite bidding web site you should find the parts you need. Good luck.

Posted on Sep 04, 2007

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Your post is correct that error 53 refers to bad memory board or at times defective SIMM only. Since you have replaced them and no change, you may want to try to do a Cold Reset of the printer. This is done by powering on the printer while holding down the GO or Online button. Additionally, you may want to check/reset your NVRAM settings which can be done manually through the Service Mode.

This page lists most of the HP Laser Printer error codes. This link displays most HP LaserJets - Cold Reset Instructions.

Hope this be of some help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Nov 16, 2007 | HP LaserJet 4si Printer

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