Try a full power refresh in case the BIOS has become corrupted and is preventing a normal start i.e the laptop is not passing POST (Power On Self Test)
Here’s the procedure:
a). Disconnect the charger if connected.
b). Remove the main battery from the laptop.
c). Disassemble the laptop and remove the coin cell RTC battery from the motherboard. Here’s the service manual for the laptop. Click on Contents > Coin cell battery to view the necessary pre-requisite steps and then the procedure to remove the battery. Note the orientation of the battery for when you have to re-insert it. It is +ve on top - marked on battery. When the battery is removed from the laptop, use a DMM (voltmeter function) to measure the battery’s voltage. If it is <2.6V DC replace it. Usually the battery is a CR2032 Lithium coin cell battery that is available most everywhere. Check the battery type, printed on the battery itself, to verify the type number in case it is different.
d). Press and hold the laptop’s Power on button for 30 seconds and then release. This will restore the BIOS back to the factory default settings.
e). Reinsert the coin cell battery (or replacement battery) - remember the orientation!
f). Reassemble the laptop, reinsert the main battery and connect the charger.
g). Switch on the laptop and check if it starts OK. There may be a message on the screen about the date and time being incorrect. This is normal as the BIOS has been reset. Once the date and time have been corrected, the message won’t appear the next time that the laptop is started.
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