My computer isn't turning on... What's going on ?

I turned off my computer about 5 hours ago, and tried to turn it back on, but, nothing happened...
It isn't old, I haven't added any hardware in about 3 months, so I doubt that it is a power supply...

Can someone help, please ?

Answers:
Try to reseat the internal power cables to the motherboard, and the cables to the power supply. Try a power supply tester to see if the PSU is dead. Try to leave it overnight, in case it had gotten too hot, so all the heat can dissipate. Other than that, you just need to go through and try swapping out different parts to see what the problem is - trial and error.
If it's overheated, leave it off for a while and try it tomorrow. If it still doesn't work, it may be a virus that did that to you. A similar occurence happened with my computer. Come to find out, it was a virus and we had to have our entire hard drive wiped clean and reformatted. If this is the case, hire a professional. this is the only advice I can give you. good luck.

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