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Can I test the voltage through the external floppy drive port? If so, which pins are 5v and 12v?

So I've washed the board twice. Once with a little bit of dish liquid. I still get the small thin horizontal lines. Yes, I will need to get it recapped. Although shouldn't it function now that I've wiped the very small amount of capacitor liquid off the board? I get the checkerboard pattern...

Thanks a lot everyone. It is worth it to still put it through the dishwasher before the recap? 

When it first boots I get these horizontal lines. After I switch it off and on I get this jumbled mess.  I plan on putting it through the dishwasher tomorrow. I've already scrubbed the area around the capacitors with alcohol with no success. A full re cap will be attempted after I get the...

Thanks a lot.  After I took it off, I noticed there is an extra set of holes at one end. What are these for when the ROM chip can't even fit all their pins in the extra holes? 

I picked up a Macintosh Classic knowing it was non functioning for a very nice price. It has horizontal lines across the screen on start up with no bong. When turned off and on a few times its horizontal lines are scrambled into a mess. It needs a new PRAM battery. Will it boot without the PRAM...