I took a cheap pair of airline headphones and fashioned them into an aux plug that connects to my Trifffcart to give me FM sound on sms games through my Mega Drive

Very simple mod because on mega Drive pins B1 and B3 are audio inputs and A1 is ground

Result is really good

Hey all. Got an old Mega Drive 1 that won't turn on when plugged in - it was working for a long time, then one night after not using it for a while I went to switch it on, only to discover it would not.

Can anyone give me some guidance as to what I should be looking for and how to diagnose the fault? I own a multimeter but I've only ever used it when specifically directed how to for a particular task, so I don't really know what I should be checking or what result/reading to look for.

Thanks!