HP ProOne 400 23.8-inch G4 All-in-One Business PC - Rear Components; Bottom Components

Rear components
Component Component
1 DisplayPort port (optional)
– or –
HDMI port (optional)
– or –
Serial port (optional)
4 RJ-45 (network) jack
2 USB 3.1 Type-A ports (2) 5 Power connector
3 DisplayPort port 6 Security cable slot
Bottom components
Component Component
1 Power button 3 Hard drive activity light
2 Power light
HP ProOne 400 20-inch components 5