The power LED will change colour to show the region selected. Then this is the service for you! You can also change the Hz of the console 50Hz|60Hz.
Kaico SEGA Saturn 2X Line Doubler & SEGA Genesis HDMI Adapter - for Megadrive, SNK Neo Geo, Sega Genesis, Sega Saturn Console - Supports RGB and Composite Output - All in
Sega Mega Drive Switchless Region Mod Kit
Mega Drive PAL-60 Project » regionmod
It also saves you from drilling holes in your console. Also includes an 3mm multi colour LED (fits all models), with which you may choose replace the
Sega Mega Drive/Genesis Switchless Region Free & 50/60HZ Mod
Console modding install service for Sega Mega Drive / Sega Genesis with the following options., Sega Mega Drive Switchless Region Mod Install
Sega Mega Drive Install Service
Console modding install service for Sega Mega Drive / Sega Genesis model 2 with the following options., Switchless Region Mod, The Mega Drive Model
Sega Mega Drive Model 2 Install Service
Sega MD/Genesis Switchless Region, 50/60hz & DFO Kit: Quick Installation Guide - Retro Upgrades
Sega CD 1 Repair & Region Free Mod
Megadrive / Genesis, Master System and Sega Saturn Region Switchless Mod
Sega Megadrive : switchless region mod - Pimp my retro handheld
Sega Mega Drive Switchless Region Mod Install Guide