HP ProBook 450 G4 Notebook PC and HP ProBook 455 G4 Notebook PC - Maintenance and Service Guide
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Component Description
(1) Power connector Connects an AC adapter.
(2) Battery light When AC power is connected:
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White: The battery charge is greater than 90 percent.
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Amber: The battery charge is from 0 to 90 percent.
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O: The battery is not charging.
When AC power is disconnected (battery not charging):
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Blinking amber: The battery has reached a low battery
level. When the battery has reached a critical battery level,
the battery light begins blinking rapidly.
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O: The battery is not charging.
(3) Vent Enables airow to cool internal components.
NOTE: The computer fan starts up automatically to cool
internal components and prevent overheating. It is normal for
the internal fan to cycle on and o during routine operation.
(4) External monitor port Connects an external VGA monitor or projector.
(5) HDMI port Connects an optional video or audio device, such as a high-
denition television, any compatible digital or audio component,
or a high-speed High Denition Multimedia Interface (HDMI)
device.
(6) USB 3.0 port Connects an optional USB device, such as a keyboard, mouse,
external drive, printer, scanner or USB hub.
(7) USB Type-C charging port Connects any USB device with a Type-C connector and can charge
products such as cell phones, laptops, tablets, and MP3 players.
(8) Memory card reader Reads optional memory cards that store, manage, share, or
access information.
(9) Drive light
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Blinking white: The hard drive is being accessed.
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Amber: HP 3D DriveGuard has temporarily parked the hard
drive.
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