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Buy Master System II Replacement Part: Official Console Motherboard (IC BD M4Jr. PAL 2M) Master System Australia
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Sega Master System II Motherboard Replacement - iFixit Repair Guide
Consoles Unleashed on Twitter: "#Sega #MasterSystem 2 - 9-Pin Mini DIN AV socket #RGB, Composite & #CSYNC. Switchless Region mod for 50Hz/#60Hz switching, LED in power switch, & controller pause circuit. Install