Question about HP LaserJet 4 plus Printer
Hi, There are 3 things that can cause blank pages. The most common is the laser shutter pops off on the spring side and blocks the laser from hitting the cartridge. The shutter opens when the cartridge is inserted. The cartridge guide that sits above and behind the cartridge misteriously gets eaten by the printer. Without it, the cartridge rides too high for the toner to transfer. The high voltage power supply goes totally dead. If the first 2 are ok, then replace the high voltage power supply. (There are 2 power supplies in the printer. One the low voltage power supply supplies voltage to all the boards, fans, etc. The high voltage ps only supplies voltage to the toner cartridge.)PS-The laser/scanner shutter is found under the top cover and below and by the front of the laser/scanner assembly (black box). Control of the shutter is on the left side of the laser/scanner. Good luck
Posted on Sep 04, 2007
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Posted on Jan 02, 2017
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