I jailbreak my iPad 2 wifi 5.1.1 with absinthe the other day and I installed a few apps and it was running perfect. This morning, I tried to install resupported4+ 1.7-1 but after 40 minutes, I can still see that it is installing. I decided to turn it off then turn it on again. Now, only the apple logo is shown. I can't turn it off again. I tried pressing together the home button and power, and the logo will disappear but will appear again as soon as I release the buttons. It can't be detected by itunes and absinthe anymore. Please help.