If you have apps on your ipad that are “black” or “grayed out” or just “won’t work”, here are some things to try:
First, make sure you have a live connection to the internet. Fire up a web browser and visit a website you’ve never visited before. Then plugin your iPad and wait a half-hour to see if anything changes.
If nothing has changed, then do the “iPad Reboot Dance“:
Swipe out of all your running apps,
then press AND HOLD the power button on the top of your iPad.
Swipe to turn it off.
Wait 2 minutes, and power it back on.
THEN plugin your iPad and wait a while, to see if anything changes.
Try clicking on one of the dark apps – sometimes that gets the install process kickstarted.
If NOTHING works, then send an email to IPAD – listing what apps are dark.