My hp 840 does not turn on. It just blinks and the fan whizzes. Fix it
My hp 840 does not turn on. It blinks and the fan whizzes when power button is pressed... how do I fix that
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If your HP EliteBook 840 blinks and the fan spins but won’t boot, it’s usually a power or hardware issue. Do a hard reset: unplug charger, hold the power button for 20–30 seconds, then reconnect and try again. Remove any external devices. If possible, reseat or test the RAM—faulty RAM often causes blinking lights. Try booting without the battery (charger only). Check if the Caps Lock/Num Lock blink pattern indicates an error code. If nothing changes, it may be a motherboard or BIOS issue—professional repair is recommended.
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