Question about Canon PIXMA MP780 All-In-One InkJet Printer

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Cannon pixma 780

Please Wait is flashing all the time. Unplug both pwr and USB for a day then plug in just pwr Plaese Wait still there. No lights for copy, fax,scan or photo. Pwr button does nothing and stop reset same result. Tried new USB cable nothing.

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  • Anonymous Nov 16, 2008

    I have the same problem, anybody has a solution

  • jim_spinger Nov 20, 2008

    I have the same problem. If I just leave the printer flashing sometimes after a couple of hours sometimes after a few days it will continue through the power on sequence and work. After that it is fine until we have another power outage and it tries to turn back on. It seems to be something in the power up check, like the head position sensor.

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  • 10,594 Answers

Is your printer under warranty? If yes, ask warranty cover please.

Posted on Sep 24, 2008

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Try resetting the printer:

1 - power off.
2 - hold stop/reset ,hold ON/OFF
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The printer turns on and the lights flash. there is also an error code 5010. I tried to hold the power button to force a color test but nothing happens?


Try these solutions:

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If I helped you, please take time to rate my answer :)

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dear,
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This error can be difficult to solve because various things can cause it.

Since this is a new printer, maybe there is some packing or packing tape that is obstructing the carriage.
Verify that the carts and printhead are installed properly.

Check the gears as best you can for any obstructions.

If the carriage moves to a center position when you open the cover as if to change cartridges, try a reset to clear the error message :

1. Turn off printer (use button, don't unplug)

2. Hold down Resume button and press Power button.

3. Keep holding down Power button and let Resume button go.

4. Press Resume button 2 times then let BOTH buttons go.

5. Green lights will flash and then stop blinking.

6. When green lights are solid, press the Resume button 4 times.

7. Press the Power button and the printer should turn off, if not, press the Power button once more.

8. Your printer should respond as normal

Sometimes you have to try this a couple of times, if you've never done it before.
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