Hi, perhaps the ribbon cable connecting the motherboard is partially loose. Just to be sure, I’d like you to run a self test
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# Turn the calculator on and put it on the home screen
# Press [mode]
# Press [Alpha]
# Press [S] (the ln key)
# Press [enter] four times (congratulations, you’re now in the diagnostics section!)
# Press [on]
# Now your calculator should be displaying different patterns on the screen. Press [enter] to cycle through all 45 or so patterns and contrasts, please tell me if the bottom part of your display works for any of the patterns.
# Press [on] multiple times to exit the diagnostics section
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If your screen still doesn’t work, I’d suggest looking at a topic on ribbon cable repair which you can find [https://www.cemetech.net/forum/viewtopic.php?p=116516#116516|here].
Good luck, please let me know if you have any issues or questions!
Hi, perhaps the ribbon cable connecting the motherboard is partially loose. Just to be sure, I’d like you to run a self test
# Press [mode]
# Press [Alpha]
# Press [S] (the ln key)
# Press [enter] four times (congratulations, you’re now in the diagnostics section!)
# Press [on]
# Now your calculator should be displaying different patterns on the screen. Press [enter] to cycle through all 45 or so patterns and contrasts, please tell me if the bottom part of your display works for any of the patterns.
# Press [on] multiple times to exit the diagnostics section
If your screen still doesn’t work, I’d suggest looking at a topic on ribbon cable repair which you can find [https://www.cemetech.net/forum/viewtopic.php?p=116516#116516|here].
Good luck, please let me know if you have any issues or questions!