I am using computer with gigabyte EX58-UD3R Rev 1.6 motherboard when I shut down system as normal from side to side OS. While I pushed the power key to twist it back on not anything happen. I fortunately had an extra system available. I went to gigabyte site as well as instigate the troubleshooting guide for these troubles. I followed the troubleshooting steps as well as no help. Confirmed power supply. The led was on, consequently, power going to the system I require some assist here.
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