Hi, My calculator stop displaying 2 horizontal pixel lines. I had opened the calculator to check if the problem was in the flex and it's fine. Then i start changing the contrast to maximum & minimum. I had notice when i change to maximum contrast the pixels in the lines appear. Does anyone know what could it be? Best Regards
Exercising the LCD display and its driver electronics very often fixes *blank* pixel lines. Turn up the contrast until it's pure black, then turn the V200 on and off rapidly about 50 times. After that, leave it on for about 10 minutes with the display pure black without letting it turn itself off from lack of use. Then turn it off and give it a rest for about ten minutes and then turn it back on again. If the blank lines are still there, wash, rinse and repeat. I've had to do this anywhere from once to three times to get the blank pixel lines working again on a few Voyage 200's.
GUEST... thank you very much.. works fine with my voyage ;)
SOURCE: Random characters lines and pixels
I've had a similar problem in the past with my TI-86. It still happens sometimes when I don't use it for a while. To fix it, all I did was set the screen to its darkest setting and left it on for 10 minutes (keep it from turning itself off, by pushing buttons every few minutes.) It works great, and the calculator is fine unless you leave it unused for a month or so. A similar solution may work for you.
SOURCE: Display Screen Voyage 200
The Solution, which suggests to replace the capacitator seems to be the only permanent.
Turning the device on and of (with "2nd" + "on") rapidly for a few times (about 10-15 for me) made the lines disappear for while, too.
I had the same prob with vertical lines on the screen, and getting messed up when there was lots of numbers on the screen.
Solution: Change your batteries. Put some freshies in then adjust your contrast until you see the little black box. If you still have a problem with the lines, darken the screen until it's black (2nd up repeatedly) and let it sit for a couple minutes. Lighten your screen back to normal (2nd down) and turn off then turn her back on.
SOURCE: Blank vertical lines are appearing on the screen.
Hi, and sorry for my english !
Maybe the LCD driver voltage is wrong or noisy. I had the same problem: some vertical lines (not constant), pulsing contrast after powerup, pixel crosstalk, sometimes no screen
Solution: Try to replace the LCD power negative voltage buffer capacitor.
In my hardware version it is in the middle of the two T6B07 column driver IC (U3&U4) on the right side. Colored black, electrolytic type and the Value is : 10uF/25V. Chage it to around the same type.
There is enought space, so you can use a small sized non smd type capacitor. Be care of the polarity.
I hope it will help... ;)
Greetings from Hungary!
SOURCE: SCREEN PROBLEM
Hello fezzaniaahmed. Im sorry to inform you no parts from TI for the TI-82. You may find another TI-82 with a different problem and 1+2=1. Good luck.
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I don't have de U1, U2, U3 & U4 chips, it seems that the hardware version is newer.
I revived my voyage 200 after 10 years sitting in a drawer. The blank lines made me put it away then. I resolved the problem and is as simple as simple as setting the contrast of the screen to all black (diamond green button and +button) at night and leaving it till next day. All vertical a d horizontal lines are gone. Hope my comment is useful. Bye.
I did a similar thing as Carlos Seyde (comment from sep 2020) and the trick solved the problem with several vertical lines on my Voyage 200 from 2003 ????
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