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Just adding my to experience as well (I know its already a while since last post), that after many hours spent troubleshooting: - Why HD SC Setup not working or failing to initialize, including using different vendor ids and using Patched version - Tried other HD Tools like Lido, Anubis, HD...

I'm going to repair those traces near C2, C4 area. I'm having trouble finding the datasheet on the U1 chip, Not sure if pins 28,27 has a broken trace leading to nearby vias. Does anyone know where I can find an LC III schematic?

I have 32MB of RAM and nothing in the VRAM slot. Doesn't the LCIII have a 512K onboard?

Ok, I finally got the startup chime! But I hear the death of chime afterwards and no video. I've checked the PSU and its getting the proper voltage readings. Right now I am just following traces blindly without a schematic. Edit: Here is a photo that is washed and being recapped. 

Hello, I am new here and I recently obtained a bunch of Macintosh IIs and LC III. The owner that gave me the LC III said that it was working recently but then it stopped working. When I power it on, there is no chime and no video output, but the hard drive and fan spins. So I didn't think it's...