Sega GENESIS / Mega Drive II | Black Screen of DEATH! & Bad Audio!

A friend of mine asked me to take a look at his Mega Drive 2, as it was only showing a blank screen and not playing any games! It also appears to have a problem with the sound, producing a beeping/crackling noise!
Let's see if we can repair it!
Hope you enjoy!
Steve
PS. I'm not an expert in repairs at all. I do this for fun, and it may not be the best or safest way to go about repairing broken stuff. I'm pretty good at melting plastic though. Please don't copy me - I'm an idiot.
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