I changed the ink in my Lexmark 3400 printer and I keep getting an error message "cover open" and it's not open. I tried everything....unloading the software then reloading the software, shutting it off and turning it back on, and I keep getting the error. What is it?

If the ink cartridges you purchased are not Lexmark - that could be the problem. I used to have a Lexmark printer and I did the same thing - I purchased ink cartridges that were compatible but not Lexmark brand. Everything seemed fine until I tried to print and then I would get the same error sign and low ink message and it would not print. I kept thinking I was doing something else wrong and tried everything. In the end I broke down and got ink cartridges from Lexmark and that solved the problem. Now I have a Brother printer and I never buy anything other than Brother ink cartridges because I'm always afraid of that same thing happening again. I wish I knew which printers WOULD accept those non name brand ink cartridges, but thus far I do not know of any printers that do. Hope this helps you.

A firmware update for the Lexmark Prevail Pro705 will help fix the printhead issue you are experiencing. Please follow the steps below on how to successfully update your printer:

1. Open the printer cover and remove the printhead and tanks (if installed). Note: Carrier will come to the center automatically with this error message as the cover is opened. Remove the ink tanks > open the printhead latch and remove the printhead > close the printhead latch, close the printer cover and confirm the error message goes away from the operator panel.
2. Proceed with the firmware update. Please visit the Lexmark website to download and install the Lexmark Pro700 Series Firmware Update.

After successfully updating your printer, open the printer cover > re-insert the printhead > close the printer. If no printhead error comes up, continue with normal installation steps for cartridges. If error comes up again, please contact Lexmark Technical Support Center for further assistance.

A firmware update for the Lexmark Prospect Pro205 will help fix the printhead issue you are experiencing. Please follow the steps below on how to successfully update your printer:

1. Open the printer cover and remove the printhead and tanks (if installed). Note: Carrier will come to the center automatically with this error message as the cover is opened. Remove the ink tanks > open the printhead latch and remove the printhead > close the printhead latch, close the printer cover and confirm the error message goes away from the operator panel.
2. Proceed with the firmware update. Please visit the Lexmark website to download and install the Lexmark Pro200 Series Firmware Update.

After successfully updating your printer, open the printer cover > re-insert the printhead > close the printer cover. If no printhead error comes up, continue with normal installation steps for cartridges. If error comes up again, please contact Lexmark Technical Support Center for further assistance.

What is the version of your ink cartridge? It could be that it's not seated properly in the cartridge carrier. Open the printer cover and remove the cartridges. Close the cover. Unplug and replug the printer into the power outlet in the wall to reset it. When the printer turns on, open the printer cover and reinsert one cartridge first. Close the cover. If no error, open the printer cover and reinsert the other cartridge. Replace whichever cartridge is causing the error to appear. You could also try to insert a different known working cartridge to determine if the other is faulty.

If your printer still in warranty please replace the printer or This is the problem the cover switch in the printer you need to replace the switch this switch is very difficult to find in the printer is usually hidden ,you need to check the cover there will be a projection in the cover which will go into a slot thats where the switch is located..

Good luck....

HI this will help you, I have located the link and this is going to give you all the info that you need.

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www.fixyourownprinter.com/forums/printer/46998


Thank You
Jayson

im looking for the software to run 3400 can you help me get it

printer screen shows cover open but it is,none buttons will work

The [H4-00] system error popped up when the power went out of the house. I called Sharp tech support (1-630-378-3590) and was talking to their tech support in less than a minute.

The FIX? Just press the following keystrokes:
# * C * This will clear the display error, now press…14, then press the green button twice. This should let your printer start to warm up and you have fixed your problem.

I had that problem too.

Unplug the printer.
Hold the printer cover open while you plug in the printer.
Then wait for the printer to power on while still holding the cover open.
Then close the cover.
The buttons should work and th error message should be gone.

It worked for me.