HP Photosmart C8180 All-in-One Printer - Manual (Page 143)

Self-maintenance sounds
The HP All-in-One will make mechanical noises at various times to perform periodic
maintenance functions, such as replenishing the ink levels in the print head assembly or
cleaning the print head. This is normal operation and is necessary to ensure the HP All-
in-One produces the best quality printouts.
CAUTION: A message on the display will notify you when the HP All-in-One is
performing maintenance functions. Do not remove power from the device during this
time.
Turn off the HP All-in-One
To avoid damaging the HP All-in-One, you must properly shut it down by using the On
button located on the device. Do not turn the HP All-in-One off by unplugging the power
cord or turning off a power strip.
Chapter 12
142 Maintain the HP All-in-One
Maintain
the HP All-in-One