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Printer keeps flashing Error Code 204.  Manual says turn off, unplug and replug and turn on  If error persist please contact tech service.  Please help.  

I have a PIXMA MX492 printer that has an error code B204. It says to turn off, unplug and contact support/manual. I've looked at the online manual. It says "turn off, unplug, contact support". OK! I contacted online chat and got nowhere...well...exce...