Vantec UGT-PCE430-4C User Guide - Page 10

Chapter 3: Troubleshooting Tips  If card and devices connected to the computer do not seem to be working properly, please perform below basic troubleshooting steps: 1. Check that all cables are correct and securely connected. 2. Make sure USB device's power is turned on. 3. Make sure the devices are getting enough power. 4. Make sure there is no problem with the card installation.  Computer failed to start after inserting the USB 3.0 PCI Express card. Turn off the computer, remove the USB 3.0 PCI Express Card, and try to restart the computer. If the computer starts successfully, it means that the card has not been inserted into the PCI Express slot correctly. Please clean slot contact with a dry cloth and try another PCIe x4 slot. This PCIe x4 card will also fit into the PCIe x8 or x16 slot.  Getting a yellow exclamation point on controller UGT-PCE430-2C/4C Page 10