Printhead problem Good Day, I have a HP OfficeJet Pro L7680 All-in-One that is displaying printhead problem with magenta/cyan printhead. This fault occurred immediately after a general power failure within the vicinity whilst the printer was powered up. I suspect that this is a board fault caused by the electrical problem however, it may not be and possibly there is another solution with which someone is familiar. If anyone out there could help me would appreciate it before calling an engineer. Thanking you, in anticipation. Freddie.

Try this...


http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c01817398

Sir

Please See Below You Tube Link URL To Fix Your HP Printer Error

How to Fix Failed Alignment HP Officejet Pro 8500 Premier All in One...

Try using the HP Print Diagnostic Utility in Windows.

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this sounds simular to the photosmart C7250 ink system failure. which cause by air in the lines. and we fix this by reseting the printer and it redoes the cartridge installation. thus pushing all the air out.

Try cleaning the print heads. Or replace the two colors it's asking for magenta and cyan.

Hi

You need to replace magenta and cyan printheads

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The error states that you are using non-HP cartridges for all colours. If black prints fine then you should replace the colour cartridges with genuine HP colour carts. You should be able to get a refund on the refills since they clearly do not work as intended.

Hi

Before you change the printheads check if the backing plate where the printheads contact plates sits is cleaned and inside printer where it makes contact. Otherwise you will need to replace the MC printhead

There are two possibilities here Joanne, first, it could be a false error message or else second, the Cyan/Magenta print head has gone bad.Try the following:
1. Take the Cyan/Magenta printhead out. Remember, the printhead...not the cartridges.
Clean the copper contacts with a Q Tip, moistened with plain water. Wait till it dries, put the printhead back in.
2. If this does not resolve the issue, unplug the power cord from the back and press and hold the power cord for 30 sec. This will drain all the static charges. Plug it back after a couple of minutes and see if the error message re appears.

Hi Jan,

Can you confirm that you are using a CIS or non-HP cartridges with this printer?

It sounds a lot like the printhead has reached a clogging point where sediment has built up in the black portion and loosens enough to printer a few lines before it re-asserts itself again.

Based on my experience of this printer, if you're using a non-HP delivery system for ink then you should consider replacing the black ink with a dyebase alternative instead of pigment.. Replacing the Black/Yellow printhead and running a number of test prints to purge the pigment ink in the printhead should then result in a clean and more reliable printout in future.

One other vector for problems is the cleaning area and I've found that this can become soiled with excess ink causing cross contamination within the inks of one printhead. As yet I've not found a reliable solution to counter this sort of issue.

Hope this gives some clues and hopefully some ideas of a fix.

Martin