Cleaning a logic board tips?

[SkippRnim]

Hello, I have my LC 575 (or is this a 550 or 520?) logic board that I use for my Color Classic but it's been in the garage for some time and has collected a bit of dust and stuff.

What would you recommend for cleaning this before I stick it into my Color Classic so that I don't short out something that might have formed on the board.

Do I remove the battery and then bathe the board it in isopropyl alcohol? There are no signs of leakage that I can see. Or is there? I'm not sure, can you tell me if the closeup photos like R117 are leakages the red bubble, or is this normal? I ask because some of the other resistors like R138 seem to have a red dot next to the resistor, is this something starting to leak or are these nothing to worry about?

Cheers, @SkippRnim

 

[noglin]

That board looks clean compared to some of those that I've found

You should take a closer look not on the resistors but around the capacitors with electrolytes, and that battery area.

Remove the battery and don't put it back.

Compressed air spray is great for removing dust. And isopropyl alcohol after.

This board looks like a Performa 630? I don't think you can "just slot it in" into a Color Classic? (but if you have the motherboard connector, you could adapt it: https://powercc.org/takky/)

 

[obsolete]

That board looks like it should only need compressed air, and maybe a soft brush. It would be wise to replace the electrolytic capacitors at this point.

The red dots are the glue used to hold surface-mount components in place during soldering and they are harmless.

 

[SkippRnim]

This board looks like a Performa 630? I don't think you can "just slot it in" into a Color Classic? (but if you have the motherboard connector, you could adapt it: https://powercc.org/takky/)

Ah, you're right, it is a different size. Why the heck did I have this thing? I could have sworn I did have another logic board that I swapped into the Color Classic but I returned the original when I moved because the back was exposed because the ports didn't line up. I hope I didn't get rid of the wrong board. hmm…

 

[SkippRnim]

Oh, I remember where I got this… a university that I used to work at had a whole bunch of old Mac equipment piled up by the trash bin. I had no ability to take the whole computer without getting stopped, so I yanked out the board and whatever else I could get my hands on.

Now this make sense why I have some stuff from computers I never had.