Recent content by marcocet

Yea sorry I meant I would check that out. I didn't realize the author had more books other than dead mac scrolls.

Yea im not sure why it is that high. I didnt think it was that high when i measured previously Yea I will do that and look closer for traces Oh interesting i didnt realize there were books other than dead mac scrolls. I will take a look at the dead sets section! Thank you !

Nothing seems to happen when i press it. The reset button shows 450 ohm not pressed and 0 when press so seems to be working? The Interrupt shows 3750 ohm when not pressed in though? Is 450 for the reset button too low? also interupt button may be broken as it doesnt change resistance when...

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the rom and IWM chips look fine the sockets are clean. I can try reflowing some of those rusted joints.

When I removed the battery from the holder it didnt have any holes or anything where it could have leaked from but maybe I missed something. The bracket at the back is pretty rusty I will say though. I’ll take a look under battery holder.

Yea im getting all the necessary voltages on the logic board from J12 and on the floppy connector. 12 volts is around 13.5 now which i didnt think was the case before. Is the 12 volt rail used for chips themselves or just HDD/FDD drive?

J11 meaning the speaker connection? i dont see anything that looks cracked but i can try reflowing. I already reflowed J12, the main power/video connector to make sure there wasnt any cold joints there.

Dont have any other SE or SE/30 boards unfortunately. I did do some testing though, I posted it right before you responded so you might have missed it. If you notice the non-original ram, I tried it with original 256k sticks from my plus as well.

Ok tried this and CRT showed the plus board output. The plus board didn't seem to like this though and would show video for a second and then reset, making the Bong again. The plus board also does this when i have no CRT connected so not entirely sure what to think of that. This was my test...

Yea I see the glow you are talking about. I have looked over crt connections and I dont seem to see anything. I do have a Macintosh Plus that works, I could maybe grab the video, h sync, v sync and gnd from there and see if the crt works? Unsure if the crt frequency is the same though. EDIT...

Oh i think your right this is not a resistor, ig that makes sense why i didnt read a resistance Lol. I am not exactly an electrical enginee All i have is a multi-meter unfortunately. I have been looking at starter oscilloscopes for another project tho so maybe eventually?

I was just testing resistors on the board sense it is easy to do any the big green one marked L1 is almost a dead short when its supposed to be 27Ohm No idea if that is important enough to make the system not work but, that isnt right

Still nothing unfortunately. I even tried powering up the board with a bench power supply and didnt get a startup sound so gotta be something wrong with the board at this point.

Yea I think it’s gotta be at this point. Going to take a closer look at board but other than rust by the mount where the board screws in it's super clean. Also surprised the diagnostic mode didn't work so bad chip maybe?