Remove the screws from the bottom and pull off the top cover. Note that it snaps shut so it make take a bit of prying to get it open.
The bottom cover is now detached. Slide it down the cable so that it's fully detached.
Remove the front end (right side in the picture) very carefully so as to not damage the coax cable. There's a bit of thermal paste on the antenna element (the long, thin rectangle) so it may stick to the heatsink (the large radiator part of the left).
Check the antenna cable. Mine was detached when I opened it up. Carefully reattach it (don't push too hard) so that it's flat against the PCB (the green board).
Reverse the steps to reassemble.
A few other key words so that Google picks up on this page.
10001.4128
Not ready (10001.4128)
HTC vive Wireless link box error
Please check the cable connection to the WiGig card, and press the button to detect again.
Undefind Text: ErrorDeviceEnableFailText