I have been having issues with the PEXUSB3S4V, both the computers I have tried one in failed to post / boot when it was installed with the SATA power plugged in. One refused to attempt to power on again unless it was unplugged for ~15 seconds. When the SATA power is not connected, it is not detecte…

Hello @theonecode , Welcome to the StarTech.com Community. It does sound like the PEXUSB3S4V is up and running now after removing the SATA power connection. According to the manual the power connection on the PEXUSB3S4V is optional, but it is strange that one computer refused to boot, and the contr…

PC not completing POST with PEXUSB3S4V installed with SATA power

Cards, Drive Accessories, Tools

theonecode September 13, 2025, 2:23am 2

It seems to work without SATA power? This is quite strange.

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PC not completing POST with PEXUSB3S4V installed with SATA power

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