Samsung Galaxy Tab 2 10.1 can't pair with Bluetooth keyboard after update to 4.2.2 Updated last night. Tablet can't find the keyboard when Bluetooth is turned on and tablet is visible.
This is the keyboard that came with the tablet in the student edition. I can't find anyone with this problem yet except in version 4.3. But this is 4.2.2.
I got it to work by going to the Bluetooth settings screen, then holding down the Bluetooth button on the back of my keyboard for about 5-10 seconds.

After that, the keyboard showed up on the available devices and it allowed me to pair it with my Tab 2.