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I ve got a hp deskjet 840c printer in good condition. i ve upgraded my computer and now my window program does not support it and i cannot download anything. thank you

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  • Lebanon Raingam
    Lebanon Raingam Jun 02, 2010

    Please let me know your new Operating System, let me help you.



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  • 71 Answers

Go to HP's website and download the latest driver version for your printer. This should fix the problem.

Posted on Jun 04, 2010


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I cannot install my Deskjet 840c printer to my windows 7

The Deskjet 840c driver is included in the Win7 OS. You need to use Windows Update. Connect the data cable to the computer. Windows 7 should find the driver. If it doesn't, open Windows Update and check for updates. Look under Optional Updates.

If it still doesn't properly install the printer, disconnect the USB cable and then turn the printer off and then on again. Then open the Devices and Printers window and remove the printer (right click and choose Remove device). Remove all icons for the 840c if you have multiple in the control panel. Then reboot the computer and make sure your network connection is active. Reopen the Devices and Printers window and install the printer manually. To do this: click on Add a printer, choose Add a local printer then click Use an existing port. Select LPT1: (Printer Port) in the dropdown menu and click Next. Click on the Windows Update button and wait for the updates to be completed. Choose HP as the manufacturer and the Deskjet 800 series. Now connect the USB cable between the printer and the computer. You should see the installing device driver software window. Wait until the window disappears and then click Cancel on the Add a Printer Window.

If problems persist, try a new data cable. Try directly connecting to the computer if you are using a print server or USB hub. Make sure the computer USB ports are working. The ports can be disabled for security or power savings. (Check in the Device Manager (Start > Control Panel > System and Security > System > Device Manager) or from the advanced settings for the Screen Saver (right click on the desktop anywhere there are no icons or running programs, select Personalize and then click on the Screen Saver icon. then click on Change Power Settings and Change Plan Settings for the active plan).

I hope this helps.

Cindy Wells

Jan 07, 2011 | Office Equipment & Supplies

1 Answer

What ink cartridges are compatible with hp deskjet 840c

HP C6615DN (HP #15 black) and HP C6625A (HP #17 color) inks are the compatible inks for this particular printer.
Thanks, Lolita

Nov 04, 2010 | HP DeskJet 840c InkJet Printer

1 Answer

Printer does nt work on laptop


  • Win 98 software version will never support Win XP system. Please download the software for your XP machine via the below link.

  • Save the download the file to your desktop.
  • Uninstall the older version, restart the computer and install the new version from downloaded file.
Thanks & Regards

Jan 31, 2010 | HP DeskJet 840c InkJet Printer

2 Answers

My printer started to only print random numbers and letters MODEL HP DESKJET 840C

Turn the printer off at the wall outlet, reboot your computer and then plug the printer back in.

Nov 17, 2009 | HP DeskJet 840c InkJet Printer

2 Answers

Blinking lights on my hp deskjet 840c printer

There should be some error .So you know how to remove the catridges just remove it n re insert it properly.If there are any paper jams try removing it also.and by the way if you haven't installed the drivers for HP deskjet this problem may arise.So make sure you ahve don this.Also this can be happened if the printer have some hardware problems.So none of this solutions are working its better to consult it with an expert.

Dec 18, 2008 | HP DeskJet 840c InkJet Printer

1 Answer

HP DeskJet 840c

pls. change your data cable of printer connected to computer

if it is work pls. remarks

Jan 30, 2008 | HP DeskJet 840c InkJet Printer

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