8-10 TroubleshootingStartup ProblemsWhen you turn on the computer, it does not seem to respond. Make sure that either the AC adapter is connected or the battery haspower. For models with the “HDD preheat” feature: When turning on thecomputer in an extremely low temperature environment, the computerwill heat up the hard disk before starting up. The Num Lock indicatorglows amber to indicate the heater is on. Wait till the heating is finished.However, if external AC power is not available and the remainingbattery power is too low for the heating to complete, the computer maynot start up. In case the computer fails to start up, turn off the computerand leave it in room temperature for about an hour before trying to turnit on again.When you turn on the computer, it stops after POST. Restart your computer.WLAN ProblemsI cannot use the WLAN feature. Make sure that the WLAN feature is turned on.Transmission quality is poor. Your computer may be in an out-of-range situation. Move yourcomputer closer to the Access Point or another WLAN device it isassociated with. Check if there is high interference around the environment and solve theproblem as described next.Radio interference exists. Move your computer away from the device causing the radiointerference such as microwave oven and large metal objects. Plug your computer into an outlet on a different branch circuit from thatused by the affecting device.
