PC won t turn on after freezing issues?

For around 1-2 months, my (5 yr old) PC started screen freezing, sometimes white, black and blue screens. I updated the GPU drivers, installed windows 10 and other updates, etc. It stopped for 1-2 weeks. Then started again, and would shut down and freeze after every 30 minutes. Now it won t boot up at all. There... show more For around 1-2 months, my (5 yr old) PC started screen freezing, sometimes white, black and blue screens.

I updated the GPU drivers, installed windows 10 and other updates, etc.
It stopped for 1-2 weeks.
Then started again, and would shut down and freeze after every 30 minutes.

Now it won t boot up at all.
There s still a light on the GPU.
I unplugged and re-checked all of the cables.
For a little while it made weak start-up noises, but never actually turned on.

When I hit the power button, sometimes the screen will show "signal - searching", but the PC itself won t turn on.
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