Question about HP LaserJet 2840 All-In-One Printer

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Hp 2840 Laser Jet wil not power on

HP laser jet 2840 will not power on.

I have checked-
1. Power cord - OK
2. Power source (240 volt.) (Australia) OK

3. There are no lights on the control panel.

4 There is no power indicator LED light on at the rear of the machine(if one exists)
5. Power on off switch obviously no effect.


This machine is unused but unfortunately out of warranty.
HP wants big money to fix. I have had a technical background before retirement and therefore might be able to fix with some expert assistance.

Kind Regards,

Richard S.

Posted by on

  • pastoribnv Oct 03, 2008

    When I used a compatible ink cartrige, the printer became misaligned and it was not printing correctly. I followed instructions to correct mis-aligning, pur everything back together the same, butnow I try to turn it on and nothing happens - no power, nothing. Check cord, power source.



    Any ideas?

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This sounds like a low voltage power supply issue. your low voltage is soley for powering up the machine 
part number RH3-2260 

Posted on Nov 03, 2008

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Posted on Jan 02, 2017

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