Asus UX501J - EC (IT8585VG) burnt by broken charging port middle pin

[coni]

Hello.
I'm trying to repair an ASUS ZenBook Pro UX501J and I need a little help. The story is like this:
The charging port broke and +19v touched the middle pin, therefore the super IO chip now has a hole in the middle (so obviously I will replace it, it is IT8585VG), but there is also a nearby resistor burnt and I don't know it's original value. Here is a picture attached with the resistor (the one circled with red), anyone knows how can I track down its value? It seems to be connected between the middle pin and ground, so its value is important, I think.
Thank you.

[Sephir0th]

Re: Asus UX501J - EC (IT8585VG) burnt by broken charging port middle pin

From boardview

[coni]

Re: Asus UX501J - EC (IT8585VG) burnt by broken charging port middle pin

Sephir0th, thank you, I've seen that on the boardview, but it doesn't make any sense to me to have a 0 Ohm resistor between the charger middle pin and GND, I thought it's an error on the boardview, and I didn't find any schematic to confirm. I mean, what would be the purpose of the middle pin if you short it to ground? What do you think, am I wrong?

[Sephir0th]

Re: Asus UX501J - EC (IT8585VG) burnt by broken charging port middle pin

I think it isn't a Lenovo, a HP or a Dell. The "Adapter detection" here might be nothing else, than to short it to GND. Battery detection works the same on many devices. There is no guarantee though, but can be. ��*♂️

[coni]

Re: Asus UX501J - EC (IT8585VG) burnt by broken charging port middle pin

Yeah, but still doesn't make any sense, the middle pin connects directly into the IT8585VG and it is also connected to ground through this 0 Ohm resistor. I mean, why they bothered to route it from the charging port al the way up to the EC, where they short it to GND nearby the EC, the EC will not "sense" anything.
Tomorrow I'll get the new IT8585VG and replace it, hopefully it's just that and not the PCH as well burnt, many times they fail together, that would be game over.

[mcplslg123]

Re: Asus UX501J - EC (IT8585VG) burnt by broken charging port middle pin

Before replacing SIO, do measure resistance to GND on all coils to get an rough idea.

[coni]

Re: Asus UX501J - EC (IT8585VG) burnt by broken charging port middle pin

Ok, I replaced the SIO and the laptop is working (fortunately that was the only fault, PCH was good). Now, regarding the charger middle pin on this laptop model, it is there for nothing, it doesn't have any role, it is connected to ground with a 0 Ohm resistor nearby the super IO chip. I can tell you that the laptop works perfectly without it, just with +19 and ground, the battery is charging fine, everything looks good without it.