Hi,
I have acquired a liquid damaged A1708, for practicing purpose. I am certain this laptop has never been touched, there has been no prior attempt to repair it as I know the previous owner who is responsible for the spill.
The CD3215s look fine as my charger goes to 20V, however the board only takes 20mA.
I am reading 0.2V on PPBUS_G3H and I am measuring 4 Ohms to ground, which I believe is a short although I don't have another board to get a reference from.
I am planning to inject 0.8V into this power rail in order to find out where the short comes from, but are there other things I should check first ? Like shorted MOSFETs or things like that. I don't want to end up sending 12V into other power rails and turn this potentially repairable board into something that would be impossible to fix.
I have acquired a liquid damaged A1708, for practicing purpose. I am certain this laptop has never been touched, there has been no prior attempt to repair it as I know the previous owner who is responsible for the spill.
The CD3215s look fine as my charger goes to 20V, however the board only takes 20mA.
I am reading 0.2V on PPBUS_G3H and I am measuring 4 Ohms to ground, which I believe is a short although I don't have another board to get a reference from.
I am planning to inject 0.8V into this power rail in order to find out where the short comes from, but are there other things I should check first ? Like shorted MOSFETs or things like that. I don't want to end up sending 12V into other power rails and turn this potentially repairable board into something that would be impossible to fix.