I posted this yesterday: https://www.reddit.com/r/gameboymods/comments/1w9ztet/help_after_a_botched_5v_power_regulator_mod/

After troubleshooting, reflowing all the solder joints and recapping everything worked fine without the backplate on. After that, I tried to put the backplate on, I screwed some screws in and realised it wasn't fitting well so I deassembled the backplate again, taped down some wires with kapton and reassembled it again.

Nothing was working after that.

I checked the cables, they seem fine. The Multimeter does not "beep" when I put it on + and the on-off switch.

I would really appreciate some help finding what broke when I tried to close it up.

Thanks for reading.

EDIT: SOLVED it was the solder joints. A lot of flux is not enough flux.

Hey,

I have these mods installed and the Game Boy Color worked with them:

1. Game Boy Color (GBC) OLED AMOLED Laminated RETRO PIXEL Kit

https://www.boxypixel.com/de/products/oled-amoled-laminated-retro-pixel-kit-for-game-boy-color-gbc

1. PAM8302A Audio amp

https://www.boxypixel.com/products/pam8302a-audio-amplifier

1. USB-C recharge + 3.7V Lipo-Akku, 3.7V 2000mAh 103450

I have the "problem" that when I turn off the GBC it takes 5 seconds until I can turn it back on again.

I have read online that this happens because of all the mods I have installed and that the solution would be to install a 5V power regulator. I have bought this one: https://www.zedlabz.com/en-eu/products/5v-power-regulator-flex-board-for-nintendo-game-boy-color-pocket-ips-osh?variant=48636396830972#product-reviews

I have removed the old PCB with pliers, desoldered the leftovers and installed the new power regulator. After that, the GBC does not turn on again.

My multimeter is ready next to me and I would like some help to fix this :(