HP OmniBook 2100/3000/3100 Troubleshooting and Diagnostics 3-9 Symptom Call Center: Repair Center: Repair Center: Suggestions Likely Causes Comments OmniBook 3000 has certain audio functions that do not work Audio PCA (rev 1.0). For an OmniBook 3000 with serial number TW745... or lower, replace the audio PCA if it is marked rev 1.0 on the corner of the PCA. Also, if the smaller of the two connectors on the motherboard for mounting the audio PCA is tilted slightly, replace the motherboard. (Service note 3000-10.) Serial/Parallel General problems Check settings in BIOS Setup. Check settings in Control Panel (and in Windows NT Diagnostics). Motherboard.
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. IR PCA. Motherboard. Icon PCA. USB General problems USB is not supported in Windows NT 4.0. USB PCA. Motherboard. Check for bent pins and misaligned connectors for the USB PCA. If USB works on a docking product, replace the USB PCA.