A few days ago, I decided to use my tablet to read a book and listen to music using Pandora. When I tried turning on the WiFi in settings, the "ON" would show up, but it would stay faded out. Once the screen shut off, I turned it back on and the switch was back to the off position. I assumed it was just a bug in the version of Cyanogen that I was using, so I downgraded to a version of 11 that I did not have any problems with. It did not solve the issue. I used "wipe data/factory reset", "wipe cache partition", and "advanced>wipe dalvik cache" before and after the downgrade.
I also tried installing version 10.2 using Clock Work Mod Recovery v126.96.36.199, but I kept getting an error:
assert failed: getprop("ro.product.device") == "acclaim" || getprop("ro.build.product") == "acclaim"
E:Error in /storage/sdcard1/cmupdater/cm-10.2-20131210-NIGHTLY-acclaim.zip
I also noticed that the MAC Address (Settings>About Tablet>Status) was "Unavailable".
One more thing, a couple weeks before this happened, I did have the bottom portion of the device to fall into some water. I would estimate that 1/5 of the device fell into the water. I left the device leaning against the wall for two days so that if any water did get inside, it would drain out. I tested the device out after the two days and it still worked, but I do not remember testing the WiFi. I am going to guess that this is the cause, but I would rather make sure that it is as much as possible.
So, if anyone has any ideas, I am willing to hear them.