Some "WiFi kit for UP" randomly disapear from Windows Device Manager.
We have encountered a problem with around 10% of our ~60-80 "WiFi kit for UP". These Systems (UpBoard 4/32 Passive + WiFi kit for UP) works normal till a point where the internet connection is lost. A closer look at the network connections reveals that there is no WLAN Network/Chip Windows can see (only Ethernet is left).
The solution: Sometimes a simple reboot works, often it needs 3 or 4 of them (including power cut), and from time to time the power needs to be cut for several minutes (obvious I can't test this perfectly but my Testsystem right beside me had this problem yesterday and ~5-10 seconds wasn't enough, I thought the WLAN Chip was broken, I tried it finally for around 5 minutes and now it works again). BIOS is at default Settings.
Did you know of such Problems? I could believe that 1-5% of the modules could be faulty if they were cheaply made in China, but 10% (or more, we couldn't get the exact number if customers reboot it without telling us)!?