Maybe is the faulty of AC ADAPTER or LOGIC BOARD ASSY
Make sure the adapter is working. You can try a different power adapter as a solution. If you have some issues on its operation, you can do a hardware reset. Try the steps from this site, How to reset canon mp510. The reset steps here saved my printer after refilling the cartridges.
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there is no reset button, to reset the printer unplug the printer from the power and wait 3 minutes, this reboots the software, if the printer still doesn't start and function properly the unit is defective
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