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I need your help because the new drive I bought still isn't working. Here is what I get from Apple Personal Diagnostics with the old (above) and the new (below) drives: No name found for the new one. Any ideas ?

The picture above is of the old but still working 1990 70MB Quantum drive that came with the mac. I removed the A1 A2 jumpers on it and it indeed started loading System 7.5.5 instantly.

Back again everyone, I received the new chip today and soldered it. Then I checked all the connections again just to be sure. First try using the new HDD I bought, it did the exact same thing as before. Then I tried with the old HDD and it started several times. The system boots up after...

lol Removed the chip with Chip Quik and used 30 AWG wires. Just have to wait for a new IC now.

Sure     I apologize for the unorthodox soldering as I realized only afterwards that I should have used smaller wires. But everything is connected.

I'm Back. I tried with two different drives, but as they are old I cannot trust them. So I bought a new one from maccaps.com thus the delay in my answer. Same problem with the new disk, the disk starts, make some noise first but quickly does a ticking noise (one tock every 3 sec) but nothing...

I checked all traces going to/coming from the SCSI IC, they are fine.

The voltages above were the ones coming from the pwr supply. With the RAM they are -5V (6), -11.77V (7), +5.04V (12,13), +12.71V (14) Molex are 12.33V and 5.05V RAM was maybe just a coincidence because today it wont boot on the HDD no matter what.

ATX connector measured voltages are -4.98V (6), -10.47V (7), +5.28V (12,13), +12.62V (14) Molex disk connector voltages are 12.71V and 5.08V ;)

Hello, I'm new to the forum and Macintosh. I recently bought a non working SE/30 on eBay that came with a nice surprise in the form of a (hopefully working) network card. -Turned it ON... Nothing (nice Simasi pattern) -Opened it, all capacitors had leaked. -Recapped the board, first time I...