Printer won't feed paper

@gumbanyvan45991 if you have the same issue when the tray is low on paper, the problem is likely in the feed roller assembly. This usually points to worn-out pick-up rollers. It could also be a sensor detecting a jam or foreign objects stuck in the paper path. Check the troubleshooting section of the service manual. The disassembly of your printer is shown starting on page 17 of the service manual that you can now download from this page Canon G3010 Printer under the Documents tab.

Of course, you can also check this video for a more visual help with that