Support Code:300 The printer does not respond

This is annoying. There does not seem to be a permanent solution. I've tried all the suggestions here. Assigning a permanent address, removing and adding the printer, turning the printer off and on, and I've also reloaded drivers. I had said that I gave up and connected the printer via a long USB cable. That worked for a while and then I had the problem again a couple of days ago.

Normally I'd say that the simplest solution was to turn the printer off and on. Unfortunately, the MX922 takes forever to power off. It's a great printer, but some things are ridiculously slow. So I end up pulling the plug.

Just ran a little experiment. I brought up the printer app, went to settings, and clicked on Supply Levels. It came back "Information not available". When I closed the box, I had Support Code 300 showing. So I unplugged the USB cable from the hub and plugged it in again, and was able to get supply levels. But if I clicked OK and then tried to get supply levels again, I once again got Information not available and the code 300. Granted, I did not attempt to print, but it should not be this flaky.

Hey,

had the same issue with a Canon MG5450 series printer.

Suddenly could not print anymore through WiFi, etc.

other printers in our network no printing problems, resp. the HP´s running fine.

Solution that works for me after hours & hours testing :-(

- Go to Printers & Scanners in your System Preferences.

- Delete the Canon printer (in my case the Canon) from the list, by clicking the "-" sign.

- went to the Canon Website and download the actual OS 10.10 driver software

(Care; it seems like that only the version for 10.10 works, nothing else in my case, even that mean 10.X or higher).

- Install the software form canon.

- Then add the Canon printer again by clicking the + sign.

- After a while, the printer appears.

- Just add it then.

- BUT during the installation procedure for "Add printer" in the last chapter OS ask for "print using"!

- Instead of "Airprint" or "Autom." I went to "select driver to use.."

- Choose the "new" canon driver I installed before.

- confirm & done

Actually it works so fare and cross my fingers!

Maybe it is a corrupt OS driver for a hand full of printer spec. Canon causing this?

Best Mat

Re Support code: 300, my Canaon MG3500 Printer. I have just picked up on this thread. After scanning a number of document recently, I couldn't print from my iMac but was able to copy material. Frustrated I pulled the power plug whilst the machine was powered on, waited 10 seconds and put the plug back in the power socket. After the whistle and bells - hello - out came the copy I was trying to print. Have printed off another paper just fine. Fluke or not ??

Depends what you define as a fluke. In this case I'd call it a workaround. When you power on, the printer gets detected. Unfortunately you have to power off before you can power on. I used to use the power off power on technique as one of the many I tried.

That said, I have not had a problem for at least a month. I wonder if 10.10.2 fixed the problem. Anyone?

Of course having said that, I'll get the problem the next time I print.

Thanks - this solved my problem also. Error started after latest software update 😟

Thanks foreverlearning,

This worked for me.

I downloaded McAfee LiveSafe internet security and I believe that somehow mucked up my Canon 6120 printer connection.

I followed TBannor's advice and now my printer works! 🙂

Hopefully no more problem.

MP 990 and latest OS X. Got 300 this morning and have been tearing my hair out until I found this thread. Deleted and reinstalled and it all works. Thanks a bundle.

thank you! I've been trying for ages and just did this and it worked!

I just encountered the same problem with my Canon Pro 100. for no apparent reason I could not get anything to print or contact the printer through its IP address. Per suggestions here, I deleted the driver and tried to re-install. Then I could not get the printer past my router as the setup repeatedly rejected my network password. Canon tech support finally gave me the name of an authorized repair facility and we assumed that the network card had failed.

Then.....

I went into my router and deleted the fixed IP address I had reserved for the printer and the next thing I saw was the software asking me if I wanted to keep the existing printer configuration with an automatic IP . Everything works fine, now. I don't care if my MAC wants to handle the IP as long as it keeps working.

So...one thing to check is how your printer IP is being handled by your router. From my experience I can say that if there is a conflict things may still work for awhile and seem OK before they get weird.

Did as TBannor suggested. I can print from the PC so I know they are communicating but I still can't scan. The only option I have is to local (USB) option and that does not work. Seems to be scanning but document never comes up on the PC (error code 300). I don't know how to get it to scan and connect to PC via wifi. Any help would be appreciated. Also, same issue. Worked fine until today.

Thanks, worked for me too!

I am using a Canon MX920 hooked up via WiFi and had the same issue for the first time this morning---Support Code 300 and it wouldn't print. All I did was shut the printer off, unplug it from the back, plugged it back in, turned it on and it printed. For PC users contact Canon support (have your printer serial number handy) and they will walk you through setting it up on WiFi---they helped me. 1-800-652-2666 M-F 🙂

Jeannie

Hi - Generally Support code 300 from Canon is a failed print head. This happened to me last year, I bought one directly from Canon at a surprising reasonable price and it fixed the problem.

There are many helpful suggestions, but what worked for me, finally, was changing my firewall settings.

The printer had been installed before, but in the process of upgrading to Yosemite I turned on the firewall on with "Block all incoming connections" selected. So when I tried to print I would get the error. After deleting the printer, it would never showed up in the add window. After de-selecting "Block all incoming connections" in the firewall the printer and scanner would connect and work correctly.