3-8 Troubleshooting and Diagnostics HP OmniBook XE2 Symptom Call Center: Repair Center: Repair Center: Suggestions Likely Causes Comments Audio Sound does not play Check settings in BIOS Setup. Increase sound volume (Fn+UPARROW and software controls). Check whether mute is active (mute button and software controls). Check for sound resource conflicts in Device Manager (Windows 95/98) or Administrative Tools or Control Panel System (Windows NT). Speakers. I/O PCA. Motherboard. Check operation using headphones or external speakers. Sound does not record Check settings in BIOS Setup. Check software controls for microphone—it should not be muted in recording panel. Note:
The microphone should normally be muted in the master output panel. Inverter PCA (mic). Motherboard. I/O PCA. Check operation using external microphone. Serial/Parallel General problems Check settings in BIOS Setup. Check settings in Control Panel (and in Windows NT Diagnostics). Motherboard. Use loop-back connector during test—see page 3-13. Infrared General problems Infrared communication is not supported in Windows NT 4.0. Infrared is disabled and no drivers installed as shipped. (Drivers are included.) Check settings in BIOS Setup. Standard IrDA and fast-IrDA are incompatible (they use different drivers). For fast-IrDA, check for DMA conflict with ECP parallel port. I/O PCA. Motherboard.
USB General problems USB is not supported in Windows NT 4.0. Motherboard.