Does the laptop show that the battery is charging when just the charger is connected?
If it doesn't check that the charger is OK i.e. 19.5V DC at the output plug of the charger, and if that is OK check that the DC-In jack (supplier example only) on the laptop is OK and that power is getting to the motherboard. If the jack is faulty, search online for 858021-001 to find suppliers that suit you best.
If it does try a full power refresh in case it is a corrupted BIOS and check if that resolves the problem.
Here’s the procedure:
a). Disconnect the charger from the laptop if connected.
b). Disconnect the main battery from the motherboard.
c). Remove the RTC battery from the motherboard.
Here’s the maintenance and service guide taken from this support webpage for the laptop. Go to p.38 and then to p.58 to view the procedure to remove the main battery and the RTC battery respectively. Unfortunately with your model you will have to remove the motherboard to access the RTC battery.
When the battery is removed measure its voltage. If it is <2.6V DC replace it. The part number is 741976-001 . If you search online using the part number only, you will find suppliers of the part. Although it looks like a common CR2032 Lithium coin cell battery which is available most everywhere e.g. supermarkets.
d.) Reinsert the RTC battery (or its replacement). (+ve on top as marked on the battery)
e). Reverse the above steps to re-assemble the laptop.
f.) When the laptop is completely re-assembled, connect the charger and try to turn on the laptop.
If it starts OK there may be a message about the date and time being incorrect. This is normal as the BIOS has been completely reset back to its default settings. Once the date and time have been adjusted the message won’t appear the next time that the laptop is started.
If you had previously changed any user defined settings in BIOS to suit whatever specific hardware configuration that you had for the laptop, then these will have to be set again.
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