PC Trouble...

The screen flickered,
The PC hanged.
I thought it’s my graphics,
Or maybe it’s my RAM.
I tested my video card,
At a shop in town.
I looked like a retard,
When my card was sound.
I went to a different shop,
To have my RAM changed.
When I got home my jaw dropped,
For the problem still remained.
I fiddled with all the parts,
But nothing seemed to work.
I really felt like giving up,
Before I turn berserk.
I decided to give one more try,
In case I overlooked.
I used another power supply,
And immediately the ground shook.
A miracle was born;
I was overjoyed.
The battle was won;
My PC is no longer spoilt.