Hi,
i have a second L480 that had some Liquid Damage (USB-C and Ports on left). The LCD has Coffee on the left side (barely visible).
It had some Coffee spilled, the notebook was in a bag, when the thermos leaked.
The book was fine for a while and still worked, so i used this a reference when measuring voltages.
The book powered on with Power Button and was fine.
Next day i wanted to continue to repair, but didn´t realise that i had a short with the meter test leads.
Ground from Meter was connected to Board GND.
Positive from Meter was shorted to Board GND.
During Measuring of Voltage on the Thinkpad, i measured
PJ101 and PJ203.
After a few second i realized, that i shorted PJ101 and PJ203 to Ground during my measurement. I had some Sparks touching the PJ101/PJ203
I think
PJ101 VSystem2 to GND was no Problem (19V to GND)
PJ203 to GND seamed to have fried some parts.
The Thinkpad only Powers On if i disconnect the CMOS Battery.
CMOS Battery a 3V.
Where would i start now?
I have Schematics and Boardview.
Assume the USB-C Port missing, where would i inject 19V direct on the board?
Thanks
Jürgen
i have a second L480 that had some Liquid Damage (USB-C and Ports on left). The LCD has Coffee on the left side (barely visible).
It had some Coffee spilled, the notebook was in a bag, when the thermos leaked.
The book was fine for a while and still worked, so i used this a reference when measuring voltages.
The book powered on with Power Button and was fine.
Next day i wanted to continue to repair, but didn´t realise that i had a short with the meter test leads.
Ground from Meter was connected to Board GND.
Positive from Meter was shorted to Board GND.
During Measuring of Voltage on the Thinkpad, i measured
PJ101 and PJ203.
After a few second i realized, that i shorted PJ101 and PJ203 to Ground during my measurement. I had some Sparks touching the PJ101/PJ203
I think
PJ101 VSystem2 to GND was no Problem (19V to GND)
PJ203 to GND seamed to have fried some parts.
The Thinkpad only Powers On if i disconnect the CMOS Battery.
CMOS Battery a 3V.
Where would i start now?
I have Schematics and Boardview.
Assume the USB-C Port missing, where would i inject 19V direct on the board?
Thanks
Jürgen