Just took the board off and scanned it. Looks like all the magic smoke is still inside. Nothing black that shouldn't be and no holes blown out of any of the chips.
I don't have the fine soldering tools to be removing SMT parts, or an ohmmeter I'd trust to not fry other things if it's just a shorted diode.
I looked up that repair place in Canada that does a trade on the boards, firmware chip swap and return shipping for $50.00 Any places in the USA do that?
"This is because the bridge is usually capable of tolerating the overvoltage, however it passes the incoming 19V supply directly to the drive's 12V input."
My translation of that is "This is an <expletive> STUPID DESIGN!" USB bridge boards are cheap, drives are not. If anything in an external is going to go poof due to an improper power supply, the bridge board should either be designed to handle it without harm or sacrifice itself to protect the drive - but what we have here is the bridge is designed to handle it without harm, without providing protection to the drive. The bodyguard just jumped the wrong way and the sniper got the principle. "Agent Bridge, you're demoted to scooping dog poo." (Remember the one season TV comedy "DAG"?)
Has me wondering if there's a way to add 12v over-volt protection to a My Book bridge.