How can I troubleshoot the poe switch all ports suddenly shut down

How can I troubleshoot the poe switch all ports suddenly shut down 10 slot poe switch
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100 poker chips Unmanaged switch, 4x 101001000 RJ-45 PoE, Gigabit PoE Ethernet, PCIe slot IGPCS-E140 is a PCI-Express unmanaged Gigabit PoE Ethernet

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