What if you only get half the screen and the rest just rolls?

It could be a hardware problem. Half a screen not working doesn't sound good to me. I have a PaperWhite Kindle. I had another Kindle I dropped and it came up like yours, with half a screen showing the picture and the other half the screen showing white. It's now a paper weight.

You can try a total reboot by holding down the power button for about twenty seconds. Mine hangs up every couple months and the touch screen stops responding and the reboot by holding down the power button for about twenty seconds fixes it every time. It takes a few minutes. You have to sit there and watch the slow progress bar fill in as it goes through the re-boot process.

If this doesn't work, you might try removing the back cover, disconnecting the battery. Letting it set for minute or so and then reconnect the battery, re-install the back cover and try a normal short-power button push first and if nothing happens, follow it with the long power button push.

That would be the lcd connector in side of the ipad. You will have to take apart and might have to get a new screen.

the problem is in the touch screen or something like oil or grease may be on the screen causing problems.

The screen is broke and needs to be replaced. ur lookin at about hundred bucks just for the screen. replace is better than to fix

Adjusting Screen Brightness The screen on the Kindle Fire uses more power than anything else, and the brighter the screen, the more battery power it uses. To increase battery life, you can lower the brightness of the display.
Unlock the rest of this book. Swipe the status bar down to open the Settings drawer.
Unlock the rest of this book. Tap Brightness.
Unlock the rest of this book. Slide the brightness control to the right to increase brightness and to the left to decrease brightness.

screen needs to be replaced

The screen is broken and needs to be replaced.

That is a pretty inexpensive tablet. The screen is broken and the machine isn't worth repairing. The screen will cost far more than a new comparable tablet, sorry for the bad news.

you should just make someone fix it who are good with electronics

hold on / off button for 20 sec