Hi @vip_aha,
If reseating the ram doesn’t work, try a power refresh and check if that resolves the problem.
Turn off the laptop if on, and disconnect the charger if connected.
Open the laptop (if not already open) and disconnect the main battery. Then hold the laptop power button operated for 30 seconds and then release, to dissipate any residual charge from the laptop.
Reconnect the battery, reassemble the laptop, reconnect the charger and turn it on and check.
Here’s the [http://h10032.www1.hp.com/ctg/Manual/c05473330|hardware maintenance manual] for the laptop, taken from this [https://support.hp.com/au-en/product/hp-pavilion-15-br000-x360-convertible-pc/15551167/manuals|webpage].
Go to p.30 to view the necessary pre-requisite steps and then the procedure to remove/replace the battery