Hello guys. I am new to this forum, and also to this world of soldering and technical restoration of consoles.

I still have my childhood Sega Master System (the model that is rectangular and red/black + it takes both cartridges and cards). It holds a special place in my heart. It must stand on its rear to be able to turn on (and stay on). If I turn it on this way, I can sometimes gently lie it down into the normal position without it going out. I would love to be able to fix this issue on my old machine. I have opened everything up, and I am ready to test the various components as needed. But I do not know where to start?