Don`t assume the PSU is fine. The LED may be on but your symptoms are typical of a failure. I would change that component first and hope that when it failed it didn`t blow a motherboard component as well.
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This 2D animation about monsters is illustrated in a Van Gogh painterly style
Siri not working? Try these troubleshooting fixes
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.