Ok, so what I’d do is measure the resistance to ground on your other primary rails, these can be found at the inductors surrounding the main Max PMIC, see this topic for more details.
Can you also let me know specifically what the resistance to ground is on the SYS rail? (on the cap near BQ)
The SYS rail is effectively regulated battery voltage, there are many ICs on the board which use this rail as VIN. You would expect it to measure approx 4V, but at this point in time, you shouldn’t be connecting battery or USB to the console with potential shorts elswhere.
Resistance to ground on the SYS rail would normally be approx 7K or greater.
Typically (but not always) if the short on the SYS rail is not as a result of the BQ IC then it’s usually one of the two Max ICs below and to the left of the SoC, but before going down this path I need detailed resistance readings of the other previously mentioned rails as it’s whichever rail represents the lowest reading (if there are others which have a short to ground) that determines next actions… for example the SYS rail might not actually be the primary fault etc.
Unfortunately not.