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crwdns2934241:0crwdne2934241:0 mayer

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Here's where to download the service manual:  http://www.retrevo.com/support/Canon-iP2600-Printers-manual/id/12397bh446/t/2/

The lights are most likely diagnostic in nature,  See if you can discern a pattern to them and then check in the manual.

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open