Question about HP Color LaserJet CM6040f MFP Q3939A Printer
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Posted on Jan 02, 2017
You can try this work around on your all in one printer, follow these steps.
1. Remove the cmos battery. How to:
2. Plugged the power supply into a power strip that has a switch to turn off power. Reason: So you'll be able to turn off the power from the power strip instead of unplugging the power supply from the wall all the time.
3. Disable ink level checking for both black and color. To do this, when you turn on the power from the printer. It should say Initializing. When it's done and it says the date. Press the left and right arrows at the same time. Then press the numbers 456. It should then ask you a Yes or No question. Press the number that says Yes. Then you'll press the two arrow keys again and this time you'll press numbers 789. A Yes or No question will appear and again you'll press the number that corresponds with Yes.
Sometimes this procedure doesn't work and you'll be required to remove the power supply from behind the printer. Once unplugged, wait 30 seconds before plugging it back in.
Posted on Sep 18, 2010
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When a background switching malfunction occurs, "F" and "4" will display
alternately on the function number display panel of the scanner.
Wipe the top and bottom glasses located inside the ADF with the Cleaner F1
and check if the problem persists.
If turning on the scanner again does not recover the situation, then follow the procedures provided below:
1 Does the same symptom occur after turning OFF and ON the scanner? Press power button of the scanner for more than 2 seconds to turn it OFF, and after more than 2 seconds elapse, press the power button to turn the scanner ON.
2 Are the cables between the Control PCA and the BW Motor damaged? Or are the connectors connected correctly?
3 Is the white reference work properly? If not, then replace the BW Motor.Perform background changeover test.
4 Is the OPT Unit installed correctly? Check ADF (Front) and ADF (Back)
5 Replace the Control PCA and see if the error is resolved.
6 Replace the OPT Unit and see if the error is resolved.
Hope the above information is helpful.
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