HP OmniBook xe4100 HP Omnibook xe4100 and xe4500 Series Notebook PCs - Corpora - Page 142

Troubleshooting and Maintenance Troubleshooting Techniques • Check the port settings in Control Panel. Open the hardware Device Manager, and then double-click Universal Serial Bus Controller. • Test the USB port with the e-Diagtools diagnostics. See "Testing the Hardware" on page 145. Startup Problems If the computer doesn't respond when you turn it on • Connect the AC adapter. • Press the power button to try turning on the unit. • Reset the computer by inserting the tip of a ballpoint pen into the reset button on the bottom of the computer. Then press the power button to turn it on. • If the computer still doesn't respond, remove the battery and AC adapter, remove any PC cards, and undock the computer if docked. Then plug in the AC adapter again, and reset the computer using the reset button. If the computer won't boot from battery power • Make sure the battery is properly inserted and fully charged. Check the battery's charge by removing it and pressing the pad on the side of the battery. The lights show the charge level. • If available, try another battery. If the computer won't boot from the floppy disk drive • Make sure the floppy disk drive is selected as the boot device-see "To change the boot device" on page 30. • If you're using a USB floppy drive, use the BIOS Setup utility to make sure Legacy USB Support is enabled-see "To run the BIOS Setup utility" on page 147 If the computer stops responding after booting • Check whether you are connected to a TCP/IP network with no DHCP server. This can cause a long delay at startup because DHCP is enabled. Contact your network administrator to determine the proper TCP/IP configuration. 142 Corporate Evaluator's Guide