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Recommended action
Turn off the power by using the power switch, wait at least 30 seconds, and then turn on the power
and wait for the product to initialize.
If a surge protector is being used, remove it. Connect the product directly into the wall socket. Use the
power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/go/LJColorMFPM375 or www.hp.com/go/
LJColorMFPM475 or the support flyer that came in the product box.
57 Fan Error, Turn off then on
Description
The product has experienced a problem with its internal fan.
Recommended action
Turn off the power by using the power switch, wait at least 30 seconds, and then turn on the power
and wait for the product to initialize.
If the error persists, contact HP. See
www.hp.com/go/LJColorMFPM375 or www.hp.com/go/
LJColorMFPM475 or the support flyer that came in the product box.
79 Error Turn off then on
Description
The product has experienced an internal firmware error. Under most conditions, the product
automatically restarts.
Recommended action
Turn off the power by using the power switch, wait at least 30 seconds, and then turn on the power
and wait for the product to initialize.
If a surge protector is being used, remove it. Connect the product directly into the wall socket. Use the
power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/go/LJColorMFPM375 or www.hp.com/go/
LJColorMFPM475 or the support flyer that came in the product box.
Black Cartridge Low
Description
The toner cartridge is nearing the end of its useful life.
Recommended action
Printing can continue, but consider having a replacement supply on hand.
ENWW
Troubleshooting tools
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