HP Pavilion manual 111

		Repair Center:	Repair Center:
Symptom	Call Center: Suggestions	Likely Causes	Comments
Notebook does not boot	Use only DDR-266 SDRAM modules.	SDRAM module
after adding SDRAM
Audio
No sound audible	Increase sound volume.	Top case	Check operation using
	Check whether sound is enabled	Speaker assembly	headphones or
			external speakers
	(mute button and software controls).
		Switchboard PCA	(switchboard PCA).
	Check for sound resource conflicts in
		Motherboard	Make sure speaker
	Device Manager.
			assembly cable is
	Test audio with e-Diagtools		connected.
	diagnostics.
Sound does not record	Use an external microphone (internal	Switchboard PCA
	microphone normally not included).	Motherboard
	Check software controls.
	Test audio with e-Diagtools
	diagnostics.
Serial/Parallel/USB
General problems	Check connections.	Motherboard
	Restart notebook.
	Use troubleshooters in Windows
	Help.
	Check settings in Control Panel.
	Check port settings in Device
	Manager.
	Test ports with e-Diagtools
	diagnostics.
	For USB: contact device vendor and
	HP Notebook Web site (see page vii)
	for latest USB drivers.
	For USB: if the device is powered by
	the USB port, try the other port.
Modem
General problems	Check settings in Control Panel.	Motherboard
	Open hardware Device Manager.
	If modem is disabled, try to enable.
	If modem has a conflict, try disabling
	another device.
	Use analog telephone line (2, 3, or
	4 wires), not PBX or digital line. In a
	hotel, ask for data line.
	Try disabling error correction and
	data compression.
	Test modem with e-Diagtools
	diagnostics.

3-14 Troubleshooting and Diagnostics Service Manual