Top 20 Canon PIXMA MP780 All-In-One InkJet Printer Questions & Answers

Make certain you have the current updated drivers for the printer. Check to see if the printer is recognized as one of the devices active and available. If its wireless, be certain the communication is both ways. Do a printer test of the Wireless transmission phase. If you connect directly by Cat5/6 cable with Ethernet, check drivers. Check cables. Check for a positive connection on both ports, Computer and Printer. Make certain the printer listed is the Main Printer when you do a setup.

Hi if the problem persists after deep cleaning the print head maybe Is defective. Search in youtube a tutorial to perform a different deep clean to the print head

I cleaned my print heads 7 times before it all cleared up. Another possibility is there may have been a piece of clear paper or sticker or something on the replacement cartridge - take the cartridge next to it out and compare the two to make sure they look the same.

Hello! Please check the "Rplacing an ink tank" part of the manual. Hope it will help you. https://manualsbrain.com/en/manuals/1796179/?page=45

Try cleaning the heads and check print head allignment on the printer, this can usually be done through the printer software or your pc settings

hello, print head(cartridge carriage unit) is complaint, you have to replace.

Carefully check all the paper driveway and also cartridges: something is still on the way

Hi. the problem is the print head, maybe is clogged or damage, try this remove the cartridges , and the print head and submerge the print head in hot water for 3 minutes, dry the print head and reinstall it, if problem persist replace the print head. TCT How to remove and clean Canon Printhead

make sure you are using good quality ,correct number cartridge and insert properly? switch off printer and change data usb cable, then switch on the printer, it will work, again same ,,must be check ink carriage cable is damage?

Sounds like the print head itself has clogged or some inks have become harder... can happen over time especially as you dont know how long inks have been on shelf before you bought them... some brands are better than others for that...

Check the printer setting. Setting may have been retained even after reinstalling drivers. Right click on Printer icon, left on printer properties. Check for print black only or the like.

Hello, my name is Steve. Even if you are able to try to clean the Scanner (in this case it is not setup like a "full-size Copier, scanner" . There are many very small wired plugs, ribbon cables the require to be removed from the logic board . The room of removal and re-install requires patients, as well as carefully unfastening the hidden snap clips. I believe that the scanner head is the cause of the problem, unfortunately, there are no replacement parts. Call up Canon and see if it is under some warranty or is they offer a replacement of this model . I hope this assists you, best regards,Steve

maybe the new ink cartridges have plastic strips that may need removing beofre inserting . just a thought

It could be the printhead has done it's dash. Canon only rate the for a three year service life. Your chances of finding a replacement head are not good.

the black is plugged in the printhead. take it out, and to the sink. run hot water thru the head. rinse it thoroughly. even put the nozzles up to the sink nozzle and force water thru it. when it decided to unplug you will get a bunch of black ink for a second or two. then take the head and shake it out and if possible blow it out with compressed air. get it dry then take a pencil eraser to the contact points on the back of the printhead to clean them. reinstall your printer and let it cycle to charge the printhead. try to print. if not good results try one more clean and if still no black, go back to the sindk and try again. repeat this a couple of times, if it doesn't work, let it sit in really hot water for a while then try to flush it out again. make sure it is dry when you put it back into the printer. try to print again. do use good inks to do this. empty ones won't work.

I did the same with my Epson 1290. Washed carefully, the felt pads came up as good as new, so no need to replace them. I did find out that the thick green felt used on piano hammers (!) was about the same thickness, so perhaps a trip to you local piano tuner/restorer could help?

It sounds very much as if the scanner is faulty/failed. The warming-up phase is to ensure that the scanner lamps output is steady, making for consistent scans. Usually this is just a simple timing circuit. Having once tried to fix a broken flatbed scanner myself, I found that obtaining the correct replacement lamp for it was impossible - I think inkjet printers and scanners are considered "consumable". You may be better off buying a new printer. Alternatively, if it keeps producing good prints, consider buying a separate scanner. HTH

The MP530 does not support T shirt printing. Sorry.