Hello, I have about Texas Instruments TI-86 Graphing Calculator. It had some dead pixels, so I tried to fix them and read about it. I didn't find a solution, so I found a suggestion to buy a screen and plant it in the old place. Do you advise me about that, and where to buy it?
We take vector mathematics, geometry, mathematical logic, solving equations, and then differential integration, etc.
Knowing that I'm in high school

Check this out
Also, there's this from a while back. It's got some helpful information.
Generally most problems have probably already been discussed somewhere in Cemetech, so check for a solution before going out and asking. Don't hesitate to ask more if you can't find anything, though.

You know the scientific subjects I take, do you advise me to continue it?

How bad is the screen? If it's not bad enough that you can't read it, it's probably not worth the trouble.

The problem is in the first two lines, so I had to jump from them, this helps, but it seems uncomfortable in the tests and so on

It is also a question of where I learn what I want to help me with things that are shortened by time (such as tricks)

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https://www.cemetech.net/forum/viewtopic.php?t=15892&start=0

What do you say here is what I have read before who have physical mathematics experience?

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[img] https://ibb.co/n6Yv1NK [/img]

I have a question for the hardware experts. If I send it to a repairman, will he be able to connect the loose wires, because this is my problem?

A repair person probably won't be able to fix that, because it appears to be a partial failure of the ribbon cable connecting the row drivers to the display. Those connections are very fine-pitch and bonded directly to the LCD's glass substrate, which makes them effectively impossible to repair.

A complete display replacement is the most likely fix to be successful.

Where can I buy this?

Only really from a donor calc unfortunately.