The screen is black on my calculator and i want to know what i can do to fix it.

The TI86 has a Screen Issue.
most of them have this problem and the missing lines problem
sometimes its electronic problem on the mainboard
if you want to fix the unit let me know

[email protected]

Jack

if you try to reduce the light on the screen and it dd not help
it could be a problem with the screen
if you want to fix the Calculator let me know

[email protected]

Jack

Hi
I fix all the TI calculators but i am in NY
its very hard to find parts for this model
it wil be better for you to buy a new
or used calculator in good condition
if you still want to fix the Calculator let me know

[email protected]

Jack

Hello, it sounds like your contrast needs adjusting. Turn your calculator on; press the "2nd" key and down. The contrast should adjust.
Happy calculating

Turn the calculator on. Press and release the 2ND key. Press and hold the down-arrow key for a few seconds until the screen lightens.

Obviously, if you've gone too far, press and release the 2ND key, then press and hold the up-arrow key.

Turn the calculator on. Press and release the 2ND button. Press and hold the down-arrow key for a few seconds.

http://oakroadsystems.com/math/ti83oops.htm#Lines

ok guys, after about 10 years of not using my ti-83, i put the new batteries in and got the black screen you are all talking about.. came to this site.. saw no solutions.. kept looking.
I've fixed my calculator, but my brain won't tell me exactly how.. but i followed those instructions..
you CAN see what is on your screen if you tilt it under the light ... just fiddle around until you can see faint writing on your screen under the black.
Press window

i have these entries in my calculator
xmin=-10
xmax=10
xscl=1
ymin=-10
ymax=10
yscl=5
xres=2

then go and press second and the down arrow to lighten your screen. it should work.

Hit your 2nd key than hold down your down arrow key

You can try to turn the contrast down by pressing 2nd and then hold "down" If the screen does not fix, put new batteries in (including the back up batteries). The problem will be resolved. Hope this helps...

call the tech support # 972 644 5580, they man was very helpful and they walk you through troubleshooting