Pc suddenly shutdown

[ice856]

PC Spec:

Proc : Amd fx6300

MOBO : Gigabyte 78lmt-usb r2

GPU : Sapphire r7-260x

RAM : Corsair vengeance blue 4gb

            Corsair vengeance black 6gb

PSU : Seasonic ss600 et

HDD : 2 x 3.5" 1TB HDD

           1 x 3.5" 160GB HDD

           1 x 2.5" 1TB HDD

 

The Psu, gpu and the processor are almost 6 years old.

 

I was only using firefox when it shut down.

After it shut down i tried turn it on three times and three different things happens each times:

 

1. I immediately turn it on and the pc turns on but only the power led that turns on the other components are not powered on and the cpu fan led only blink once and thats it.

 

2. I wait for 10 minutes then turns it on and it turns on normaly but the display shows no input(as if its not connected to the gpu). Then i try accessing my pc with teamviewer and it shows everything runs normal then i shut it down

 

3. After 30+ minutes i tried turn it on again and it turns on normal with the display but then it start to boot loop.

 

So the last state of my pc is boot loop.