Nook troubleshooting screen messed up , half bland , and half picture with lines going up and down through it nook CE0984.

There are some ideas here, but you are likely to need a service centre. Also help in the videos.

Samsung TV Has Horizontal Lines On Screen

iFixit https://www.ifixit.com > Wiki > Samsung_TV_Horizo...
Your Samsung TV has lines running across the picture. They mess everything up. You don't need horizontal bars in your view. We will walk through some things ...

Lines on Samsung TV screen

Samsung https://www.samsung.com > ... > TV & AV
Apr 13, 2023 - Troubleshooting. 1 Check whether the lines on the screen are moving or permanent. 2 If the lines sway, check the input source (HDMI 1, Video, ...

Sound like voice activation try and hold the volume buttons till it say talkback suspended press ok a few times quickly and then it will say talkback suspended

Try these two simple methods: Troubleshoot Your Nook Frozen Screen With 2 Simple Methods
you can also call call Nook Customer Service Number @ +1(844)-305-0086 (Toll-Free).

TRY a hard reset on the Nook if that doesn't work i know of this fantastic site BNTPrice.com that sells them for cheap. i hope this works for you

1. Press the "n" button to display the quick nav bar.
   

2. In the quick nav bar, tap the Settings icon.
   

3. In the Device Settings section, tap Device Info.
   

4. Tap Erase & Deregister Device.
   

5. Stop. Think. Think again.
   

6. If you really, really want to do this, go to Step 7. If not, tap the Back button.
   

7. Tap the Erase & Deregister Device button.
   

Hello
Check the smoothing capacitor to video output supply voltage, usually derived from any one winding of the LOT. It will come around 10uF350VDC to 47uF 350VDC range. If this capacitor is faulty, or gone less in capacitance with time, this type of fault will occur. Check the green volour output transistor on the video output card, can be located attached to the neck of the picture tube; for any loose soldering or leakage. OK.

This is a problem with the vertical circuit and can be as simple as poor solder connections within that circuit or defective parts. If you have no experience with soldering or TVs, this should go to a service shop. Expect a parts cost in the $30-$40 range for and IC +/or capacitors. If you'd like to attempt this yourself, please supply the exact make and model so I can post the parts required along with additional instructions. Please note that TVs contain potentially dangerous high voltages even when unplugged.

Thanks,
Dan

If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD, DLP & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

The half picture is a verticale problem. This is difficult to repair. Send to a repair shop.

The lcd display screen resister is damaged, unfortunately you need to replace your phone.