I think I killed it. Short on LCD connector, no longer boots

[Severence]

@Insomniac

When you mention diodes

Post from Calvin Here detailing the location of the diode on the rear

CC2 shorting to GND

Please check on the backside if a esd diode is on the cc lines. If so, remove it. If the short is still there, the m92t36 is bad and needs to be replaced [USB_CC_Side_A] Doe to your burnt B3 and B4 I would check also the continuity throught the choke (TX1-) = B3 [DiodeMode_PI3USB]

There is another one on the otherside of the board near the USB, same package IC. readings there will be approx 0.8

Depending on your board rev you may not have these diodes present, but take those measurments all the same.

M92 does not always fail short to ground. It could also be down to bad joints too, after verifying you have continuity from the USB to the various respective destinations I’d start by swapping the M92 IC out and seeing if you then get PC USB detection with the USB in both orientations and if so, that rules out that problem, though I don’t know that this is your primary issue.

Blackscreen and no boot logos might point to more serious issues, did you transfer the data from that EMMC to another IC/module or are you using the same reballed one? did you backup all partitions originally including boot0/1 etc ?