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I have a HP ProBook 6440b that won’t turn on. The charger LED blinks but the laptop will not turn on with or without the battery. I’m sure the battery is completely dead, but I don’t think that would prevent it from powering on. Does anyone know how to fix this?
Take out the battery, unplug the power adapter and press and hold the power button for 30 seconds. Release and plug in the power adapter, only. Does it work now? “Yes” then a dead battery - replace. Dead or almost dead batteries can cause problems. For reference: Battery and Power LED’s Battery light ● Amber: A battery is charging.● Turquoise: A battery is close to full charge capacity.● Blinking amber: A battery that is the only available powersource has reached a low battery level. When the batteryreaches a critical battery level, the battery light begins blinkingrapidly.● Off: If the computer is plugged into an external power source,the light turns off when all batteries in the computer are fullycharged. If the computer is not plugged into an external powersource, the light stays off until the battery reaches a lowbattery level. Power Light ● On: the computer is on. ● Blinking: laptop is in Sleep Mode ● Off: in hibernation or simply off. Here is the link to the user manual: http://h10032.www1.hp.com/ctg/Manual/c01… Here is the link to the service manual: http://h10032.www1.hp.com/ctg/Manual/c03…
