Question about HP LaserJet 4 plus Printer
1. Reseat the cartridge. Try a new or know good cartridge. If OK, stop.
2. Check the Hi Volt contacts on the cartridge for damage. If the contacts are dirty or damaged, clean the contacts after the repair.(This is especially important if the cartridge is recycled.) If OK, stop.
Before going further, evaluate the cost effectiveness.
3. Replace the Hi Volt Power Supply. If OK, stop.
4. Check and reseat the HVPS cable
5. Replace th DC controler
Posted on Nov 24, 2009
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Posted on Jan 02, 2017
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