Hi
I received such Laptop as junk. Opening it I saw a lot of whitish water residue , but no corrosion really ( few coils have small brown rust marks, no green copper ).
I cleaned all thoroughly and interestingly , its the Battery BMS board that has the real corrosion spots.. under the protective clear Goo !!
I want to try and power up the laptop
Battery is swollen. But I don't want to buy a new battery right now , of course .
I started work on the BMS by zooming in on green spots . 2 VIAs are filled with rusted copper goo - who knows if they still exist.. too small.
2 resistors under the clear goo were actually disconnected : the pads and the resistors rot away mostly .
Question : it looks like the SMD Resistors are a copper track stuck on top of ceramic box 🗃 - is that all it is ?
They are 0402 I think , very small , Perhaps I can just use copper wire ?
The IC in the photo is on the BMS circuit board, the ONLY damaged circuit ( and a few VIAs , status unknown ) , is Texas Instruments Battery Voltage Protection chips: BQ29410DCTR
The example circuit , has only 100k ohm Resistors , so I conclude I need such two ?
But , perhaps the Laptop can boot from a charger ONLY ? thus I don't need to mess with the Battery. I don't have Apple (compatible) Charger , only USB-C to MagSafe adapter ( I can ofc provide 19V directly , bypassing the USB-C V selection issue )
What do you think ?
P.S images taken at x25
I received such Laptop as junk. Opening it I saw a lot of whitish water residue , but no corrosion really ( few coils have small brown rust marks, no green copper ).
I cleaned all thoroughly and interestingly , its the Battery BMS board that has the real corrosion spots.. under the protective clear Goo !!
I want to try and power up the laptop
Battery is swollen. But I don't want to buy a new battery right now , of course .
I started work on the BMS by zooming in on green spots . 2 VIAs are filled with rusted copper goo - who knows if they still exist.. too small.
2 resistors under the clear goo were actually disconnected : the pads and the resistors rot away mostly .
Question : it looks like the SMD Resistors are a copper track stuck on top of ceramic box 🗃 - is that all it is ?
They are 0402 I think , very small , Perhaps I can just use copper wire ?
The IC in the photo is on the BMS circuit board, the ONLY damaged circuit ( and a few VIAs , status unknown ) , is Texas Instruments Battery Voltage Protection chips: BQ29410DCTR
The example circuit , has only 100k ohm Resistors , so I conclude I need such two ?
But , perhaps the Laptop can boot from a charger ONLY ? thus I don't need to mess with the Battery. I don't have Apple (compatible) Charger , only USB-C to MagSafe adapter ( I can ofc provide 19V directly , bypassing the USB-C V selection issue )
What do you think ?
P.S images taken at x25
