Question about HP Officejet Pro L7780 All-In-One InkJet Printer
I have installed 3 new ink cartridges for my HP 7780 but each time the machine shows that the cartridge is empty. I have turned the machine off/on and also done a factory reset but to no avail.
I have a virtually new unit, and the same thing is happening. Has HP considered a recell
Posted on Aug 07, 2009
How did you do the factory reset?
Take out all cartridges and heads then unplug for 30 minutes?
Plug back in and reseat all removed items?
If so you probably have a bad head.
You can order them through HP or Staples.
The heads have a very short life of 10,000 pages.
Posted on Jul 21, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
Dec 08, 2010 | Brother Office Equipment & Supplies
Oct 27, 2008 | Office Equipment & Supplies
Your machine is equipped with an ink dot
counter. The ink dot counter automatically
monitors the level of ink in each of the 4
cartridges. When the machine detects an ink
cartridge is running out of ink, the machine
will tell you with a message on the LCD.
The LCD will tell you which ink cartridge is low
or needs replacing. Be sure to follow the LCD
prompts to replace the ink cartridges in the
Even though the machine tells you that an ink
cartridge is empty, there will be a small
amount of ink left in the ink cartridge. It is
necessary to keep some ink in the ink
cartridge to prevent air from drying out and
damaging the print head assembly.
a Open the ink cartridge cover.
If one or more ink cartridges are empty,
for example Black, the LCD shows
Ink Empty Black and
b Pull the lock release lever down and
take out the ink cartridge for the color
shown on the LCD.
c Open the new ink cartridge bag for the
color shown on the LCD, and then take
out the ink cartridge.
d Remove the protective yellow cap (1).
If the protective yellow caps come off
when you open the bag, the cartridge will
not be damaged.
e Each color has its own correct position.
Insert the ink cartridge in the direction of
the arrow on the label.
f Lift each lock release lever and push it
until it clicks, and then close the ink
g If you replaced an ink cartridge, the LCD
may ask you to verify that it was a brand
new one. (For example,
Did You Change Blck?) For each
new cartridge you installed, press 1
(Yes) to automatically reset the ink dot
counter for that color. If the ink cartridge
you installed is not a brand new one, be
sure to press 2 (No).
If you wait until the LCD shows
Near Empty and Ink Empty, the
machine will automatically.
Find this on page 113 of the manual:
Click on this link or copy and paste the complete link into your browser.
If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response.
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