A year ago, I wanted to fire up my Sega MegaDrive again. Being the idiot I was, I couldn't find the AC adapter, and I figured the SNES adapter would work. As you can guess, feeding AC into a device expecting DC isn't a great idea. Anyway, at the time I just put the MegaDrive away, and later learned what I did.
Anyway, today I was dusting off my consoles, as I was planning on selling some of them. Simply put, games have kind of lost my interest. I've gotten more into electronics and such, and games generally just don't hold my attention for very long, save for a few exceptions. However, I didn't want to sell my MegaDrive. Next to the interesting hardware it has, which I'm willing to experiment with once I get a bit better with electronics, the FM synthesis of the YM2612 chip just rocks. Even though a lot of Nintendo games have great music, nothing beats a good FM synth soundtrack. So, now knowing that I shouldn't use an adapter putting out AC, and that the Model 1 adapter is center negative, I went looking around for a suitable replacement. Eventually I got frustrated and just took a 12v 2A brick, opened the case, and took the soldering iron to it. All I did was swap the DC out wires, so instead of being center positive, it would be center negative. Hooked it up, the tip of the adapter fitted perfectly in the MD port, and... nothing. No LED, not a sign of life. At this point, I'm certain I blew it up.
I've heard that usually in such cases, the LM7805 voltage regulators are broken. Is this true? Could there be potentially more blown parts? How should I check for those?
I'm still a bit of a noob in electronics, but I'm not afraid to crack out the soldering iron and do readings with a multimeter, so throw it at me