- Poor contrast on TI-82
- 13 Feb 2018 06:03:04 pm
- Last edited by Pi Time on 06 Aug 2021 12:41:16 pm; edited 2 times in total
Edit: Solution is further down the page. Though unless you are in for a challenge, you'd be better off getting a TI-82 from the later production runs (Look for TI-82 without golden-yellow lettering on the bezel).
On my TI-82 with a set of fresh batteries, I need to set the contrast to 9 so that the LCD produces a clear image, whereas a TI-83 produces a clear image at contrast 3 with the same set of batteries.
So far, I have performed a self-test on the calculator and removed all batteries including the backup coin for an hour, and it did not fix the display. I have yet to get around to checking ribbon cable resistance though.
Any clue to fixing this problem?
On my TI-82 with a set of fresh batteries, I need to set the contrast to 9 so that the LCD produces a clear image, whereas a TI-83 produces a clear image at contrast 3 with the same set of batteries.
So far, I have performed a self-test on the calculator and removed all batteries including the backup coin for an hour, and it did not fix the display. I have yet to get around to checking ribbon cable resistance though.
Any clue to fixing this problem?