Hello,
I have a Dell G15 ryzen edition (ryzen 5) that turns on but won't post, black screen, keyboard lights on, caps lock led on, fans turns and the battery indicating light is showing 2amber and 1 white according to dell website it's a cpu failure, but i tried few basic things before i open it up i tested the screen by pressing the d button before powering it up but it didn't show anything i tried the ctrl+esc for bios recovery but still black screen i tried refreshing the screen, i plugged it on an external monitor but same thing. Next step i unplugged the battery and kept pressing the power button for 1minute and reconnected the battery but it didn't work so i grabbed the multimeter and checked the main power rail and the 19V is present (no short to ground) the 5V rail and the 3V rails are present too then i went into resistance mode i measured all the cpu vrm coils to ground, 4 coils read 5ohms the other one read 9ohm which i believe is right? now for the gpu vrm coils all 4 coils measure 0.4ohm to ground (0.2ohm the resistance of the probes) the gpu is GN-20-P0-A1 which i believe is too low but i'm not sure,
the main bios voltage (winbond 25Q16JWSIQ) is missing on pin8 and from all other pins, the ec bios voltage (winbond 74M12JWSIQ) on pin8 is 0.352V.
When i power it on i get voltages on the cpu and it gets warm too but not on the gpu.
It's kinda confusing because according to the battery indicator code it's a cpu failure but i get no voltage on the main bios and a very low reading on the gpu vrm coils so what is causing the problem cpu, gpu or could it be a corrupt bios?
motherboard is LA-K454P Rev: 1.0(A00)
I have a Dell G15 ryzen edition (ryzen 5) that turns on but won't post, black screen, keyboard lights on, caps lock led on, fans turns and the battery indicating light is showing 2amber and 1 white according to dell website it's a cpu failure, but i tried few basic things before i open it up i tested the screen by pressing the d button before powering it up but it didn't show anything i tried the ctrl+esc for bios recovery but still black screen i tried refreshing the screen, i plugged it on an external monitor but same thing. Next step i unplugged the battery and kept pressing the power button for 1minute and reconnected the battery but it didn't work so i grabbed the multimeter and checked the main power rail and the 19V is present (no short to ground) the 5V rail and the 3V rails are present too then i went into resistance mode i measured all the cpu vrm coils to ground, 4 coils read 5ohms the other one read 9ohm which i believe is right? now for the gpu vrm coils all 4 coils measure 0.4ohm to ground (0.2ohm the resistance of the probes) the gpu is GN-20-P0-A1 which i believe is too low but i'm not sure,
the main bios voltage (winbond 25Q16JWSIQ) is missing on pin8 and from all other pins, the ec bios voltage (winbond 74M12JWSIQ) on pin8 is 0.352V.
When i power it on i get voltages on the cpu and it gets warm too but not on the gpu.
It's kinda confusing because according to the battery indicator code it's a cpu failure but i get no voltage on the main bios and a very low reading on the gpu vrm coils so what is causing the problem cpu, gpu or could it be a corrupt bios?
motherboard is LA-K454P Rev: 1.0(A00)
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