Hi,
A yellow exclamation point next to a device in Device Manager means that Windows has identified a problem of some kind with that device is detected but not installed.
There are several causes of Code 39 errors:
· A required device driver is missing.
· A required binary file is corrupted.
· There is a problem with the file I/O process.
· A driver that is referencing an entry point in another binary file is unable to load.
I recommend you to uninstall and reinstall the latest drives from the manufactures’ website and check if it helps.
Refer to the steps from the following Microsoft article.
Why isn't Windows finding my device: http://windows.microsoft.com/en-US/windows-8/why-isnt-windows-finding-device