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Any update on this project....

Ok no go yet, I want to check if the ROMS are working or maybe burn new ones....First, any place that I can find the ROMS for this logicboard and second do you guys know what EPROM is compatible (27C010 ?) with it...Thanks in advance! Trying to read the ROMS with my TL866II-Plus without...

Check from the IC pins to the PCB BIAS or end point in the schematics....

Check the CPU pin, none are touching, maybe artifac of the photo....One of the board Re-Solder the EGRET because it was contamidated but I test continuity before and for me it was working....but just in case. Remove the reset and interrupt push siwtches and deoxit them, one of them look like it...

The tested the memory of my working board in both logic board. So again, my board with memory work great...this 2 logicboard, same behavior....

Added the photos... no damage traces that I can tell.... Customer don’t know if the boards work neither....so trying to figure it out was wrong with them.

PSU has been recap?

I have in my hand 2 logic board of Classic II with the blue wire on them, I alredy recap both of them and clean them....but when I try to test them on my working unit, black screen, no bomb but costan energizing of the speaker. Example Some Kind of sound........silent.....sound.... Any ideas...

Thanks everyone for the clarification!

In this unit I didnt see any difference. The original capacitor where in good shape.

Yes I have the FPU Expansion Card, you can see it installed on the open picture...that why I am asking...I already have the max memory, but for me the FPU card ROM area is there to be able to put a ROM that fix the 32bit dirty ROM.

Bellow, my finish Mac Color Classic Restoration: Disassemble and clean Everything Recap Original Logic Board and Analog Board Fix and Recap a LC 550 Logic board to convert it to a Mac Classic II - Previous owner try to re-cap and damage capacitor pad Service Floppy Drive Replace...

I just restored a Classic II (Disassemble, clean everything, service floppy drive, recap main board, analog board and co-processor expansion board, replace fan, SCSI2SD 5.1 and retrobright) with the co-processor board, 10mb of RAM but looking for a clean 32bit ROM I can burn and add to the...

I just installed a 5.1 on my CC, no issue...be sure to Initialize the partition using 7.5.3 Patch tool first, after that I use DD and Basilisk II to create my image...

Update...Sound after retrobright....the speaker again no sound...so took the speaker out and finally got to the issue...the speaker cable...So, I will disable the speaker and solder new cables!

Just want to verify that someone else got this working...First try didnt work...anyone there that has done it...any configuration changes to get it working on the scsi2sd tools.

Ok team, I order a TDA7052A to replace it! 1. I took the speaker and plug it in to a 9v battery, the speaker is alive... 2. Took the analog board out and verify that the speaker cables where not damage. multimeter and continuity test - cable pass 3. re-solder speaker cables to the analog...

Guys, needs some input...I just finish re-cap the analog board and the logic board...everything work except the external speaker...so is not a capacitor on the analog board. I just order a TDA7052A to replace it. Any thing else that I need to verify! How can I test the speaker, maybe is that!

I have the same issue with a CC original board...will this work!