HP Pro Tower 400 G9 PCI Desktop PC Maintenance and Service Guide - Page 9

Rear panel components, To identify the rear panel components, use these illustrations and tables.

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Table 1-1 Identifying the front panel components Front panel components 1 Slim optical drive 5 2 Optical drive eject button 6 Audio-out (headphone)/Audio-in (microphone) combo jack SD card reader (select products only) 3 Hard drive activity light 4 Power button 7 USB SuperSpeed 10 Gbps ports (3) NOTE: Use a standard USB Type-A charging cable or cable adapter (purchased separately) when charging a small external device such as a smartphone. 8 USB Type-C SuperSpeed 10 Gbps port with HP Sleep and Charge NOTE: The combo jack supports headphones, line output devices, microphones, line input devices, CTIA-style headsets, or OMTPstyle headsets. NOTE: The light on the power button is normally white when the power is on. If the light blinks red, the computer displays a diagnostic code to indicate a problem. See Interpreting POST diagnostic front panel lights and audible codes on page 90 to interpret the code. Rear panel components To identify the rear panel components, use these illustrations and tables. 2 Chapter 1 Computer features

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Table 1-1
Identifying the front panel components
Front panel components
1
Slim optical drive
5
Audio-out (headphone)/Audio-in (microphone)
combo jack
2
Optical drive eject button
6
SD card reader (select products only)
3
Hard drive activity light
7
USB SuperSpeed 10 Gbps ports (3)
NOTE:
Use a standard USB Type-A charging
cable or cable adapter (purchased separately)
when charging a small external device such as a
smartphone.
4
Power button
8
USB Type-C SuperSpeed 10 Gbps port with HP
Sleep and Charge
NOTE:
The combo jack supports headphones, line output devices, microphones, line input devices, CTIA-style headsets, or OMTP-
style headsets.
NOTE:
The light on the power button is normally white when the power is on. If the light blinks red, the computer displays a
diagnostic code to indicate a problem. See
Interpreting POST diagnostic front panel lights and audible codes
on page
90
to interpret
the code.
Rear panel components
To identify the rear panel components, use these illustrations and tables.
2
Chapter 1
Computer features