Probably either overheating or new PSU required.
Have you cleaned the inside of the computer out recently if not start there. Clean around the fans and especially make sure that their is no fluff or dirt in the heatsink.
Samsung Galaxy Note 10 Now On Sale: Price, Specification & Features
Best free Photoshop brushes 2019
Apple TV streaming service: what, where, when and how much
Les meilleurs écouteurs et casques audio Lightning (2019)