#1 HP ENVY 17-CR [LA-M058P Rev:1A] - No power no response to power button
от KenM0560 • 8 Август 2025, 12:29
Hello
I have just the motherboard from a HP ENVY 17-CR [LA-M058P Rev:1A] laptop. The board is not powering on at all, and is unresponsive to the power button. I do not have a battery to check if it charges or powers on from that.
After inspecting it more closely i can confirm the USB-C PD controller negotiates 20V but this is not getting to the resistor at the PWM IC (ISL9538BH). Further back i tracked 20V to AOZ1380DI but it is not passing through this IC and on to create the main power rail.
With continuity mode i tracked the flow and the power should leave the green dot on picture 1 to the green dot on resistor in picture 2 to power the ISL9538BH i believe?
Both mosfets in picture 1 measure in the M ohms range S-D, around 500K ohms G-D and around 50K ohms S-G.
Not sure where to go next, thanks in advance.
I have just the motherboard from a HP ENVY 17-CR [LA-M058P Rev:1A] laptop. The board is not powering on at all, and is unresponsive to the power button. I do not have a battery to check if it charges or powers on from that.
After inspecting it more closely i can confirm the USB-C PD controller negotiates 20V but this is not getting to the resistor at the PWM IC (ISL9538BH). Further back i tracked 20V to AOZ1380DI but it is not passing through this IC and on to create the main power rail.
With continuity mode i tracked the flow and the power should leave the green dot on picture 1 to the green dot on resistor in picture 2 to power the ISL9538BH i believe?
Both mosfets in picture 1 measure in the M ohms range S-D, around 500K ohms G-D and around 50K ohms S-G.
Not sure where to go next, thanks in advance.
