Hi all, First post here
Decided to up my game in electronics repair, and bought this dead notebook as learning material. The guy had already sold the screen assembly and ssd, I got the rest very cheap. Told me that he left it charging, and a power surge killed the non original USB C charger in use, and the note.
Schematics seem to be non existent, only sites I`ve found with reference to this model are just trying to serve me malware.
Been probing arround to reverse engineer the board, and made some progress:
- USB PD controller chip (TI TPS65994 AC, very small flip chip bga) is working, it can switch power acording to de usb port in use, and pass it to the battery charger.
- Battery controller (ISL9241) seem to be ok. Without battery plugged, it converts whatever comes from usb to 8.4V base Vsys, present in several parts of the board. With the battery, it pases Vbatt to Vsys.
- All the other power converters on board are inactive, except one near the bios chip that has 0ohm to ground. The 4 caps beside it are grounded on both sides. There`s some kind of mosfet beside them, that gets a little warm with power present; not the caps. The short is not a big one, some kind of logic is controlling it. With a proper 65w usb C power adapter is about 20ma. With a dumb usb A phone charger at 5v is arround 200ma, and I can hear some coil whine.
So my question here is for help identifing the suspected component. Searching for the markings "AWSDPK" bring no results. What should be my next steps? I`m not sure if it is usefull trying to desolder it if i can`t find a replacement.
I include high resolution images of the board, and a detail of the problem area.
Thank for your help
Decided to up my game in electronics repair, and bought this dead notebook as learning material. The guy had already sold the screen assembly and ssd, I got the rest very cheap. Told me that he left it charging, and a power surge killed the non original USB C charger in use, and the note.
Schematics seem to be non existent, only sites I`ve found with reference to this model are just trying to serve me malware.
Been probing arround to reverse engineer the board, and made some progress:
- USB PD controller chip (TI TPS65994 AC, very small flip chip bga) is working, it can switch power acording to de usb port in use, and pass it to the battery charger.
- Battery controller (ISL9241) seem to be ok. Without battery plugged, it converts whatever comes from usb to 8.4V base Vsys, present in several parts of the board. With the battery, it pases Vbatt to Vsys.
- All the other power converters on board are inactive, except one near the bios chip that has 0ohm to ground. The 4 caps beside it are grounded on both sides. There`s some kind of mosfet beside them, that gets a little warm with power present; not the caps. The short is not a big one, some kind of logic is controlling it. With a proper 65w usb C power adapter is about 20ma. With a dumb usb A phone charger at 5v is arround 200ma, and I can hear some coil whine.
So my question here is for help identifing the suspected component. Searching for the markings "AWSDPK" bring no results. What should be my next steps? I`m not sure if it is usefull trying to desolder it if i can`t find a replacement.
I include high resolution images of the board, and a detail of the problem area.
Thank for your help
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