Problem phenomenon:
The power supply defaults to sleep mode after 3 hours.
Problem causes:
The laptop would go to sleep when not in use for a long time to preserve battery power.
Solution:
Please follow the path to fix it:
Power & sleep > Additional power settings > Change when the computer sleeps > Change advanced power settings > Sleep > Sleep after > Set to 0.
If the above methods do not solve your problem, please back up your data and visit the nearest authorized realme service center for testing.