So, I've got a Mega CD II I'm trying to repair. It just doesn't power up.
After inspection I found a blown internal fuse (quite common I understand) but also a dodgy 5v regulator (spitting out 6v) and also a blown darlington transistor (switches power to regulator with vcc feed from Mega Drive edge connector).
I've replaced the fuse and regulator but I'm struggling to find an alternative transistor. I think it's Q301 and the device is 2BS963 iirc (ill edit when I've checked...)
Hopefully, when I replace this, the machine will be up and running again.
Does anyone else have experience of Mega CD II faults?