Accidently tried to change one of the ink cartridges while the printer was off. Now the printer won't turn on. It's a HP Photosmart C5280 all in one.Thanks

Calibrate the printer.

Try first unplugging power cable, and see if it clears the error

your printer's black ink or the black cartridge is already empty, you need to replace it. Also the settings is not set properly.

Same thing has now happened to me. Did you ever solve the problem?

I had a similar issue, I called HP Support and they had me change out the ink, re-run the alignment, restart, change out the paper, run the alignment again. They had me try everything you could imagine. But, in the end; there was absolutely nothing that would fix it. They said that pulling paper jams from the printer among other things (if not done properly) can permanently damage the print head to where the alignment can no longer correct it. Luckily, while it took forever, the printer was under warranty...I had to do a warranty repair, but the new printer had no issues.

Your printer uses the following cartridges:

HP 74 - Black ink
HP 75 - Cyan, Magenta, and Yellow ink
HP 99 - Photo Black, Light Cyan, and Light Magenta

You need Photo Black, Cyan, Magenta, Yellow, Light Cyan, and Light Magenta to print photos. To accomplish this you install the HP 99 photo cartridge where your HP 74 black cartridge usually goes and you keep the HP 75 color cartridge where it's at. I don't know why your printer told you to remove both cartridges, then reinstall the HP 75 color cartridge.

I replaced my ink cartridge on my HP 5280 Photosmart. Now it says, "refer to printer documentation". What do I do?

I kept having the same problem as what was experienced by gobigforgod. What should I do ? Pls help.

You must replace both with new GENUINE HP ink cartridges at the same time or alignment will fail.

This is how HP makes their money.

Usually this problem is indicative of a clogged nozzle. I'm not sure about the track record of the Photosmart C5280 (a lot of Epson printers have this problem, and you just have to keep replacing the ink cartridges). I'm going to assume you tried this, but go ahead and run a few cleaning cycles on the printer, and see what happens.