Problem with PC booting

[jwenprof]

I've had my PC for over 2 years now that I built myselfand it has had a recurring boot problem recently. Whenever, the PC is closed overnight when I go to sleep, it will take multiple attempts to boot the next day, and finally after disconnecting the power source multiple times or waiting it will randomly just boot. This is issue has especially been occurring a lot more recently, with it only occurring only probably once or twice a month in the past. When the power button is pressed it will turn on all its fans (GPU, CPU etc.) but none of the plugged in peripherals will light up such as my mouse or keyboard, the monitor also displays no signal please check connection (on HDMI mode). I have tried disconnecting and reconnecting the GPU and reseating the single RAM stick, as well as resetting the BIOS by reseating the CMOS battery. A few days ago i took the PC into a repair shop and they said the problem was the motherboard and they replaced my old one with a similar model from gigabyte. After this it was booting fine, until this morning the boot problem started again and I had to switch the PC on and off multiple times before it would boot properly. Any suggestions or fixes?

Specs:
Cpu: Intel Core i5-6400 @2.70Ghz
RAM: Kingston DDR4 8GB Stick
PSU: Aerocool VX-550 550W ATX
GPU: Gigabyte GTX 960 Windforce 2GB
Monitor: Samsung 24 inch Monitor
Storage: Sandisk SSD PLUS 240GB SATA3 SSD Solid State Drive
OS: Windows 8
Motherboard: Gigabyte H110M-H

 

[KeelinTy]

Have another psu laying around you can throw in for a week to see if that fixes the issue?

 

[jwenprof]

Sorry I got it working now it was my monitor turning from analog and digital automatically so I set it to manual. This seems to have been the issue as I have reboot the pc multiple times and it has worked now.