HP 810-145qe, CQ5802 Audio and speakers, then click Open Volume Mixer, Symptom, Possible solution

Audio and speakers

Symptom	Possible solution
No sound is produced.	If you use an HDMI connector on the graphics card (select
	models only) to connect your display (monitor) to the computer,
	you should also connect analog speakers to the computer
	Audio Line Out connector if you want to hear sound during the
	initial setup of the computer.
	Refer to the setup poster to connect analog speakers.
	Press the Mute button on the keyboard to see whether the Mute
	feature is enabled.
	Or
	1 Right-click the Volume icon on the taskbar, and
	then click Open Volume Mixer.
	The Volume Mixer settings window opens.
	2 If programs are muted, click the Mute button to unmute.
	If you are using built-in monitor speakers, use the monitor front
	panel Volume button to adjust volume. Use the front panel
	buttons to enter the onscreen display (OSD) and ensure audio is
	enabled and volume is set appropriately.
	To increase the volume, click the Volume icon on the task bar,
	or use the keyboard controls. Check the volume setting in your
	software program.
	Ensure that you connected powered (active) speakers and that
	they are turned on.
	Turn off your computer, and then unplug and reconnect the
	speakers. Ensure the speakers are connected to an audio
	connector, not a Line In or headphone connector.
	To resume from Sleep mode, press the Sleep button (select
	models only), or press the Esc key on the keyboard.
	Unplug headphones if they are connected to your computer (or
	speaker system).
Volume is very low or	Ensure that you connected the speakers to the Audio Out (lime
unsatisfactory.	green) connector on the back of the computer. (Additional
	audio connectors are used for multiple-channel speakers.)
	Detached non-powered speakers (speakers without a separate
	power source, such as batteries or a power cord) do not
	produce satisfactory sound. Replace the non-powered speakers
	with powered speakers.

36Getting Started (features vary by model)