Solid black line on the top right corner of screen

SOURCE: TI-83 Plus Problem

Batteries:
Make sure to replace the "battery backup" too the little lithium ion battery

Try Adjusting contrast:
Hold down "[2nd]" key press up or down arrow repeatedly to lighten or darken contrast.

First attempt reseting:
Step 1: Remove all the batteries
Step 2: Hold "Clear" key down
Step 3: Still holding "Clear" key reinstall batteries
Step 4: Still holding "Clear" key press "On" key until home screen is displayed.

Second shot reseting:
remove all batteries including lithium ion (backup battery), wait 3 hours and reinstall batteries.

Third Shot reseting:
Step 1: Remove a battery
Step 2: Hold down "DEL" key reinstall battery
Step 3: Possible msg pops up saying "Waiting ... Please install software" IGNORE msg and take out battery again
Step 4: Reinstall battery do not hold down "DEL" key

reseting will cause the handheld to loose all of its stored memory.

Hope that helps!

SOURCE: TI-83 Plus Went Dead

Has it been dropped recently? The screen may have cracked from impact. Press the Reset button on the back using a ball point pen.

SOURCE: ti 83 plus small black screen?

try pressing 2nd then hold in down arrow to change the contrast

SOURCE: texas instruments ti-83 plus. only have black line on screen

Hello,
Reset the calculators memory [2nd][MEM][7:Reset][1:All Ram][2:Reset]
If that does not work

You should reinstall the system which you find here

http://education.ti.com/educationportal/downloadcenter/SoftwareList.do?website=US&tabId=1&paneId=2

Use the link below to install TIConnect software
http://education.ti.com/educationportal/sites/US/productDetail/us_ti_connect.html You can also download the latest OS there.

Install TI connect on your computer and run it to open the main Window. Then connect you calculator to a USB port and, in the TIConnect main window Click the TIDeviceInfo icon. Software will try to retrieve the info. If it does your calculator is fine.

If it tells you Device Not found , Click communication settings in same pop up window where it said Not found, and Select Device, Select Cable, Select Port and Click OK..

If you are lucky and it works, you can reinstall the OS, which can be downloaded from education.ti.com. You drag and drop the OS on the TIconnect main window. Calculator must of couse be connected to computer.

If you have problem with TIconnect, use the calc-to-calc cable to transfer the OS of a working calculator. Yous should be on Receive mode [2nd][Link] --->>Receive. (When both calculators are ready hit enter.) The other calculator, you guessed exactly right, must be on Send [2nd][Link][SEND][G:SendOS]. (When both calculators hit [ENTER])

If all that does not work, then it may be time to head for a place of worship to pray for its resurection, or look for a repair shop.
Hope it helps

SOURCE: TI-83 Plus calculator: Only a line appears

Try the following steps before thinking of repairs.

Here are some steps to perform in the order they are presented.

I am inserting a copy of an earlier post to a question similar to yours. Please read the post till the end.

A Try this before thinking of repairs.

1. Push the ON button.
   
2. Even if you see nothing, press the [2nd] key and release it.
3. Press and HOLD the UpArrow key until the screen darkens.
4. You may have to keep pressing UpArrow for a little while before you see anything.

1. Remove one of the AAA batteries.
   
2. Press and hold the [CLEAR] key.
   
3. While holding [CLEAR], reinsert the AAA battery and then
   
4. turn the calculator on.
   
5. The calculator should display the message "RAM Cleared".
   
6. Release the [CLEAR] key and then press it one more time to remove the message "RAM Cleared".

1. Remove batteries including the backup battery for 5minutes.
   
2. After the 5 minute period, reinsert all of the batteries and
   
3. turn the calculator on.
   
4. Adjust the contrast if necessary.

1. Remove one of the AAA batteries.
   
2. Press and hold the [DEL] key.
   
3. While holding [DEL], reinsert the AAA battery and then
   
4. turn the calculator on.
   
5. The calculator should display "Waiting...Please install calculator software now".
6. Connect the TI Connectivity cable between the computer and the calculator.
7. Click on Start >> Programs >> TI Tools >> TI Connect >> TI OS Downloader.
8. Follow the on-screen directions to reinstall the calculator's OS.

• Serial Black cable that used to ship with the TI 83 Plus. It connects to a serial port on a computer and to the I/O port on the calculator. It requires the Graph Link software available on the TI web site (Downloads, Software and Apps, Connectivity)
• USB Silver Link cable. It connects a USB port on the computer to the the I/O port on the calculator. It requires the TI connectivity software, also available on the TI Web site.
  
• A USB mini A to mini B cable to connect two units.
• An I/O cable to connect two calculators through their I/O ports.