i have this same problem, but i cannot do a force reset... When i hold in the home and sleep/wake button nothing happens, I have tried these same steps over and over again. Neither the apple or the itunes logo ever pop up.. The screen just stays black. I recently replaced the digitizer after my son cracked the screen. I have made sure that nothing was injured during repair. I did put the digitizer ribbon in wrong and then the screen was not working correctly. I had put the ribbon in backwards. So after the first wrong installation of the digitizer, i tried to unlock the screen with my passcode but it obviously wasn't working.. i would touch the number for the passcode but the screen would respond somewhere else..so i kept getting the passcode wrong and then BAM! Ipad disabled.. so i took a break from the frustration... When i returned to my ipad i took it back apart and thats when i realized that i had the digitizer ribbon in backwards, so i fixed it and replaced the screen once again.. But now the ipad is disabled, and for some reason it will not respond when i try to shut it down all the way, no red slider at all...so i bout a apple data transfer cable and i tried to connect it to itunes and hold the buttons like i read to do in the article, and my computer recognizes that my ipad is there,,, it tells me that i have to allow access and to respond on my ipad.. but sadly i cannot.. nothing appears on the ipad.. it stays a black screen and then when i lt go the "ipad is disabled" screen comes on.....
Then i read online that i could restore from icloud.com, so i go there, i sign in just fine but my ipad is not listed in the devices there either... it says " No Devices, You must be signed into iOS8 settings or Mac OS Yosemite system preferences to see devices."
And i dont believe the ipad is up to date, it had been unused for about 2 months, until last week when i attempted to fix it :-(
So im totally lost, I dont have a clue what to do to get my device recognized. I would really appreciate any help that anyone can give,, Thank you so much in advance!!!