How to fix cut-off display on Sega Game Gear with replacement screen?

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Apr 2, 2018
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Hi friends, I recently bought a modding kit, but unfortunately, the screen that came with it was cracked during shipping and wasn't giving any display output. Instead, I sourced a similar 54-pin replacement screen that I could find locally here in Turkey. I did some testing today, but unfortunately, a part of the screen is cut off and not showing up. Is there anything that can be done about this? I was thinking maybe I could adjust the screen horizontally or vertically using a potentiometer, or perhaps tweak the firmware. But I'm not sure what kind of programmer I would need to modify the firmware, or how I could achieve this by changing some resistors on the PCB or altering the wiring. If there is anyone with experience in programming or this kind of setup, I would be very grateful for your help.
 

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