sounds like the power supply may not be upto the job anymore. try unplugging CD/floppy drived, and any extra hard and devices, just leaving the bare bones plugged to the PSU
power up and let us know what happens
Surface Pro (2017) vs Surface Pro 4
20 groundbreaking 3D animation techniques
How to mine Bitcoin on Mac
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.