I have a HP LJ 9000. When you turn on the power switch, the display flashes quickly, then nothing. No lights, no fans spins, no noise. I have replaced the LVPS and the HVPS, but there is no change. Any help would be appreciated.
I have a HP Laserjet 3500. When printing the Configuration Page, it will print only the colors fine down the page, but the black is missing. It always prints the first page perfect, after that, everything black is missing. I have replaced the black cartridge, transfer assy, and black scanner...
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