Having some issues with an old 512k that I have. The machine turns and makes the beep noise but the screen only flickers on when I give the side of it a good smack. Looking for some help on how to fix this!
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When you hit the LEFT side? (As you're facing the front of the machine, you strike the left side?) That's where the power supply is. Does the machine boot? If you put a floppy disk in there when you start it up, does it boot (or else try to boot, then eject the floppy)? If so then you're probably looking at either a bad screen, a bad power connection to the screen, or a bad power supply.
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It does turn on and yes it is when I smack the left side. Haven't checked the floppy yet but which part would need to be fixed or replaced if it was a bad power supply and would I be able to tell from looking at it or would it be an easy fix that wouldn't require a bunch of proprietary parts.
The most common component to go bad on a power supply are the capacitors. Check for swollen or leaking capacitors as well as anything "obvious" like corrosion or scorching/arcing. Apple didn't have a whole lot of proprietary parts when the Mac 512 came out.
Be careful when poking around the inside of that Mac. A CRT, even unplugged/disconnected, can carry enough residual charge to stop your heart.
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