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Computer wont turn on after cleaning the CPU fan!

To start off my computer was turning off after just watching vids on youtube or on streams, so I decided to open it up and clean the inside of my computer, as I expected there was tons of dust, so I removed the fan and the only connecter I removed was the PG(Power Good) cable.

So after I cleaned everything I tried to turn it on and nothing happened not even the fan moved, so I opened it up again and unplugged the (PG) cable and tried to turn it on with the (PG) cable unconnected and everything turned on the fan was moving and everything, so I tried connecting the (PG) cable while everything else was going on and it didn't do anything it just turned everything off, so I tried to turn on the pc again with the (PG) cable off again and it did the same everything turned on, but the problem was that the (PG) cable was still not connected and it needs to be.

So right now I don't know what to do, do I replace the Power Supply which is where the (PG) cable comes from? Or is my motherboard the problem? I also took out the fan again and put it on again just to make sure.

Please help I'm completely confuzzeled.

My computer is just a Emachines desktop nothing special.
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    volt the mean said:
    To start off my computer was turning off after just watching vids on youtube or on streams, so I decided to open it up and clean the inside of my computer, as I expected there was tons of dust, so I removed the fan and the only connecter I removed was the PG(Power Good) cable.

    So after I cleaned everything I tried to turn it on and nothing happened not even the fan moved, so I opened it up again and unplugged the (PG) cable and tried to turn it on with the (PG) cable unconnected and everything turned on the fan was moving and everything, so I tried connecting the (PG) cable while everything else was going on and it didn't do anything it just turned everything off, so I tried to turn on the pc again with the (PG) cable off again and it did the same everything turned on, but the problem was that the (PG) cable was still not connected and it needs to be.

    So right now I don't know what to do, do I replace the Power Supply which is where the (PG) cable comes from? Or is my motherboard the problem? I also took out the fan again and put it on again just to make sure.

    Please help I'm completely confuzzeled.

    My computer is just a Emachines desktop nothing special.


    If everything is connected properly back in, and you didn't damage the PC during the operation, the only alternative left is this:

    You killed it with anti static electricity from yourself. Is the PSU and the wall socket grounded? Did you discharge yourself before touching the components?

    Humans can carry thousands of volts, that gets built up in our daily environment. If you touch a CPU that can take a maximum of 2 volts, on liquid nitrogen cooling, with 2000-5000 volts in you... You will fry it and make it useless...

    Does the motherboard or other components show any sign of life? Do you have a multimeter to test with?
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