Top 10 HP Officejet Pro L7780 All-In-One InkJet Printer Questions & Answers

Since buying the L7780 printer for our business office two years ago, the printer has been a work horse for us. The problems I've seen online about scanning, paper jams and ink cartridge issues have been none existent. Then it was time to change the print head. The L7780 printed several pages before the print head error message appeared and the printer ceased printing. We tried all the solutions offered online including another print head and cartridges but to no avail. We were ready to buy a new printer. Then a member our team whom we dubbed “Service Tech 130” came up with the solution. Service Tech 130 simply pried the chips off both print heads with a screw driver and super glued the old chip onto the new print head. Now the printer has been working as if nothing was every wrong.
For this to work for those of you having the same problem, you would have to be in possession of the old print head that worked prior to the error. Attached is an image showing the location of the chip. Hope this works for you as it did for us.

This solution worked for my OfficeJet L7680--good luck!

1: Disconnect the Universal Serial Bus (USB) or ethernet cable from the back of the product, but leave the product turned on.
2. Open the cover of the product and remove the print cartridges.
3. Close the cover and wait for the Insert Ink Cartridges message to display.
4. Disconnect the power cord from the back of the product and wait for one minute.
5. Reconnect the power cord. If the product does not automatically turn on, press the Power button.
6. Open the cover and reinsert the print cartridges.
7. Close the cover. If prompted, print a calibration page.
8. Reconnect the USB or ethernet cable, and try to print a print job from the computer.

I just did the full resetting, hold # + 9 while is on (is what i did) and i unplug the power cord just one is back of the printer, and released for a while to connect again power cord, so when printer star back on, i hold again # + 9 for a 15 seconds, and power off for a moment, later push the power bottom and start a blue screen with FULL RVRAM something like that, leave the printer , is gonne make alignments and so on , so after 10-15 minutes AWSOME , factory reset setting, GOOD LUCK

When you removed the paper it's possible your damaged it and that's why the message is not going away. Did you try to put the cartridge back in to make sure it had not come out of position and just remove the power cord for a minute then plugging it back it.

Here are the steps to make sure you properly change the cartridges and the heads...

Install the ink cartridges and printheads Step one: Install the ink cartridges All four ink cartridges must be correctly installed for the HP All-in-One to work. Follow the steps below to Install cartridges:

1. Open the ink cartridge cover.
2. Remove each ink cartridge from its package.
3. Align each ink cartridge with its color-coded slot and then insert the ink cartridge into the slot. To ensure proper contact, press down firmly on the cartridges until they snap into place.
4. Close the ink cartridge cover.

Figure 1: Installing cartridges 1 - Open the ink cartridge cover. 2 - Remove the ink cartridges from the packages. 3 - Install the ink cartridges. 4 - Close the ink cartridge cover. Step two: Install the printheads Follow the steps below to install the printheads.

1. Open the top cover of the printer. Figure 2: Open the top cover
2. If the carriage does not move to the left automatically, press and hold the Resume button ( ) for three seconds. Wait for the carriage to stop moving.
3. Remove the cardboard cover from the printhead carriage. Figure 3: Remove the cardboard cover
4. Lift the printhead latch. Figure 4: Lift the printhead latch
5. Before installing a printhead, shake the printhead up and down at least six times while the printhead is still in its packaging. Figure 5: Shake the printhead while it is still in its packaging
6. Remove the new printhead from its package, and then remove its orange protective caps. CAUTION: Do not shake printheads after the caps are removed. Figure 6: Remove the printhead from its packaging, then remove the orange caps from the printhead
7. Insert the printhead into its color-coded slot. The label on the printhead must match the label on the printhead latch. Press down firmly on the printhead to ensure proper contact. Figure 7: Insert the printheads in the correct color-coded slots
8. Pull the printhead latch all the way forward, and then press down to ensure that the latch is properly engaged. You might have to apply some pressure to engage the latch. Figure 8: Close the latch
9. Close the top cover. Figure 9: Close the top cover

Step three: Align the print heads Whenever you insert or replace a printhead, the printer automatically aligns the printheads to ensure the best print quality. If the printer does not print the alignment page automatically, start the alignment process manually. To start the alignment process manually:

1. Press the Setup button on the control panel Setup and the number 6 on the keypad or scroll to Tools .
2. Press 4 on the keypad or scroll to Align Printer . The alignment process starts.

1. Press the OK button to bring you back.
2. Press the menu button repeatedly until paper size comes up
3. Use arrows to change paper size from automatic to whatever size you are looking for.
4. Start Copy

This worked for the HP Officejet 7210 All in one

I've got this problem and HP ask me to press CRTL+SHIFT and cancel. So the instalation keep going normally till the end. This was a SP3 update and some machines with WXP Home could happens.
Regards,
Marcelo

You need to remove the black/yellow printhead and dab it on a damp paper towel until you see a solid line of black ink on the towel when you press it. It won't pass the alignment until all colors work properly.

This problem suddenly happened to me. After some researching it said I should replace the printhead. I pulled the printhead and it looked dirty with perhaps some dried ink on it. On the bottom part (not where the circuitry is) is where the ink comes out. Take paper towel and fold it up and put hot water on it and then squeeze out most of the water. Place the printhead part where the ink comes out on the paper towel and the water will start wicking out the ink. Move it over and do it again. Gently clean the part with the wet towel, dry it thoroughly and reinstall in printer. It worked fine for my printer and it is printing perfectly again without purchasing a new printhead for $70. One of these days I may have to, but not now. Good luck.

I figured out the problem with my printer. If none of your ink cartridges are detected (missing) then follow the install steps below.

1. Turn on printer
2. After printer declares cartridges missing open the printer and remove the cartridges (advise putting a piece of paper under the cartridges to catch any ink that spills).
3. Turn off the printer (keep the top of the printer open)
4. Turn on the printer (still with the top of the printer open)
5. After the printer declares the cartridges missing again install the cartridges (while the printer is powered on). Close the top of the printer.
6. The printer should begin to cycle the ink into the printer and back out to the ink reservoirs.
7. After the ink cycle the printer should display genuine ink cartridges are installed
8. Make sure paper is in the tray so the printer can perform an alignment.
9. Everything should be ok after that.

Chad

Blue is made from magenta (pink) and cyan ( sky blue), if your blues are coming out pink then they are missing the cyan component.

In your machine this could be caused by a blockage in the printhead, the cyan cartridge being empty, an electronics fault, a boma pump fault (the squishy black thing on the base of the cartridge). Check your cartridge first - if it feels lighter than the other it is probably empty. Sometimes there is a fault where the entire contents of a cartridge (usually the cyan) can be emptied in a matter of days or less. If the cartridge is unusually empty compared to the other colours - refer it to HP.