Hi EG,
Please contact one of Canon's Technical Support Representatives via phone or chat. To contact a Technical Support Representative, please use the link below to log into your My Canon account:
https://mycanon.usa.canon.com
Once logged in, click on your PRO-1000 and then click on the Product Support button. When that page loads, click on either the Phone Support button or the Chat Support button to access support. A Technical Support Representative can determine the cause of the ink detection issue and resolve it or provide you with your available service options.
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