From all your problems now it's pointing to the power supply which I ask you earlier on make and model and wattage. I would bring the computer too a repair shop to have the system checked out since you do not have spare parts to test.
Hard to say would be best if you had access to spare components to swap out to test things. You might be better off bringing you computer in to be looked at.
The power supply is not one I would use or recommend it's a low quality. I would go for xfx or seasonic. Best test would to try another power supply. I suggest just bring in to a shop they can tell you what's wrong.
I took my computer to the repair shop they did a diagnostics and said its most likely the motherboard as that it needs to be reset. They said if it turns out it's the power supply they said they're oils replace it with a better one and I just pay the price of what it cost. They also told me to always clean dust from my computer
. Well thank you for helping me anyways Oscar it was better than nothing
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