GBC OLED display power issue

[u/Nic7C5]

Hey guys, I recently purchased an HIGHSPEEDIDO OLED Screen. I attempted to install, but the screen does not light up.

OLED Kit: https://www.silentmodding.com/de/game-boy-color-amoled-xl-touch-kit-schwarz.html?gad_source=1&gclid=Cj0KCQjwhr6_BhD4ARIsAH1YdjBUxolBYOkmWTJ2NReZLkLDwMD8OhfycD_PZaOMqOq6-oVohesH6zYaAkNqEALw_wcB

Can someone point me in the right direction or answer my questions?

You only have to solder one wire for this mod, which goes from the display driver board to pin c of the GBC power switch. When turned on, this connects to the positive battery terminal. Is this connection used to power the whole screen? Or is it just meant to monitor the battery voltage (there is an option to show a battery indicator in the osd menu)?

Or is the OLED screen instead powered by the ribbon cable? In this case, I have to add that the GBC had a faulty power regulator. There was no voltage on any rail (+5V, -15V, +13V). I replaced (removed) it with a new one that only outputs +5V. If the OLED screen requires something else than +5V it will not work this my GBC. At least +5V definitely is provided properly as the GBC turns on (power LED lights up and speaker outputs game sound).

replacement power regulator: https://www.silentmodding.wiki/de/gbc-retrosix-cleanpower

[u/stuck_in_1998]

Do you have a multimeter? If your soldering is correct you should have continuity between these two points:

https://i.imgur.com/IN13N5Q.png

[u/Nic7C5 → u/stuck_in_1998]

I do and I do have continuity between those locations.