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My HP 840C has suddenly stopped working. The light doesn't come on; I have checked the power in OK.

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Hello ,

Click here for the complete diagnosis of ur printer ...

Posted on Apr 15, 2008

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Disconnect from power and connect back, after this reinstall drivers

Posted on Apr 15, 2008

  • Ginko
    Ginko Apr 15, 2008

    If you are definitively sure it is not a software and driver problem. Check the voltage out from power adapter, if it is fine can be a defective power slot on the printer check the power slot, if your printer has a fuse it is located on power unit, near to adapter slot, change the fuse. eventually check the contacts from power input to board for continuity. If it is not this check for continuity components on the board (resist. and capacitor, starting from the ones near to power input.
    Ensurte first is not just the power adapter or power cable. Eventually call nearest repair service if you cannot locate the problem.

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