help me identify unknown logic board

[markgeek36]

So i’m not sure if this is the right section if it’s not please delete.

I have what i thought was a mac classic II logic board but it doesn’t really match the bomarc schematics i found. Can someone tell me if this indeed is a mac classic II? if not what it is and i’m wondering how i got it.

i do remember taking it out of a computer which i thought was the classic II

Oh yes i took off c21 but i don’t think it leaked i don’t think any of these caps leaked even though there’s a lot of grey stuff? is it dirt?

 

[Byrd]

Yes Classic II - later revision board (that doesn’t have the 4 X ROMs in line)

The crusty stuff is dirt/corrosion and needs a very deep clean

 

[markgeek36]

So have any caps leaked? it’s really hard to tell if they have i’m not seeing any wetness. the cap i did take off looked fine.

what’s the best stuff to use to remove it? i did a very basic wash with cold water but we have very hard water here so i may end up using distilled water. just using a alcohol swap didn’t seem to do much

 

[finkmac]

yeah they've all leaked.

easy way to check:

is it a classic 2 board? if yes, continue below

does it have the stock capacitors? if yes... they've leaked!

 

[markgeek36]

the board worked when i found this(outside believe it or not) however it doesn’t work now. i don’t think it boots at all but its been a long time since i last tested.

so any advice on cleaning? i’d assume baking soda and a toothbrush?

also i’m a very basic novice at soldering but this would be good practice.