Thank you fzabkar, sorry I should have updated my post! I found info on the TVS Didodes and found the 5V one stuck shorted. I desoldered it carefully with a heat gun and the drive lives again. But I haven't seen this faq before so thank you very much for directing me there!
Now I just need to find a good place to get a new diode. I want that protection. Socket Pixies are evil.
I looked at the faq and you suggested the suitable substitutes for the 12V and 5V TVS diodes in 3.5" drives are SMBJ12A and SMAJ5.0A. The one in the drive was a (On) 6V8A. The SMAJ5.0A has a clamping voltage of 9.2V. I think the 6V8A... oh, it has a clamping of 9.2V... Nevermind, I remembered wrong
All is good