HP pavillion bios won't start(no card reader with a nvidia 220 and new motherboa

Hello, My computer won't start I have got a new motherboard I even replaced the power switch and I have no card reader I replaced it with usb ports because I only have two on the front. I even replaced the power supply (The one that came stock was a 300 watt and I replaced it with a 305 watt). Could it be something with the CPU(It is also stock).
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More about pavillion bios start card reader nvidia motherboa
  1. did you use a proprietary power supply?
  2. I was doing some other research and i found out that the card reader was doing something to the bios.
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