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How can i fix my error e240,canon GP405?

my name is samuel am an engineer in Nigeria plateau state, i do seller photocopy and rapier so i have this problem with my costumer on canon gp 405 show Error e240 when it work for some time

Samuel Dammy
November 2011
hi samuel my name is paul ,e240 error is a problem with either the main dc controller or the image processor.check all connections on both boards for security .you may have to replace one or both boards .its basically a communication error between the two boards.hope this helps and good luck.

mech monster
November 2011
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Mend repair fix Canon photocopiers

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Mend Office Appliances, Photocopiers
Mend repair fix Canon photocopiers