@sasaki Could you please let us know the complete model name of the Vivobook S15 you are using?
Since the issue occurs after closing the lid or entering Sleep mode, and the power and charging indicators also become completely unresponsive, please fir...
@Hugger1 For the ASUS Vivobook Go 15 (E1504FA), the memory is onboard LPDDR5 memory, which means it is soldered to the motherboard and is not user-upgradeable.
Depending on the specific configuration, the E1504FA comes with 8GB or 16GB of onboard LPD...
