Is My PC Donezo? (Problem)

[G D]

It all started when I switch my main SSD to a old ssd, just to check if important is on it. so I can use that drive as storage. there wasn't so I switch it back.
Turn it back on everything seem normal.
Next morning turn the pc on.
Pc wont boot 
Turning it on and off. finally on several attempt the PC finally boot.
That happen pretty much everyday for a week.
Now it got worst, every time I turn on the pc
its on for like 1 or 2 second and it turn off, back on and off again.
things I have done is 
- change the CMOS Battery
Its a 4 or 5 year old PC (Yes i need an upgrade haha)
But I'm stalling time.

I don't think it the psu

do you guys know what might need be replace/or what is wrong with it?

Thanks,

[lmeneses]

Well, idk what donezo means, but maybe try using a different psu to test it, and if that doesn't work, than you should probably just upgrade