Hello, I'm trying to fix my ASUS F555LD-(X555LD) laptop. I'm a beginner BTW and I would appreciate any help. This is what I have found out so far:
In summary, 3.3V-1.05Va-MOS-1.05Vb shorted to GND. Not on the regulators and connected to the CPU, among other passive components.
So all things point to the CPU. Is there a way I can have a confirmation that it is shorted without removing the CPU SoC? I don't have the tools to do it.
Thanks in advance.
- 3.3V and 5V are ON, however, 3.3V goes through a soft-start chip to two outputs and one of them is shorted to GND. I have severed the connection to this chip and checked it is fine. The other path, shorted to GND, connects to the CPU and WLAN circuitry. Also to the BIOS, but there is no short there.
- 1.05V is ON, and there is no short around the regulator. However, there is a short after a bridge I removed, which connects to a MOSFET and the CPU. One output channel of this MOSFET is shorted to GND (measuring 0.1V when I have power) and connects to the CPU as well. The MOSFET control signals are OFF.
- The current drawn from the 19V power suppply is 0.4A. The thing heating the most was the regulators, but I also had some heat coming up from the CPU-PCH SoC.
In summary, 3.3V-1.05Va-MOS-1.05Vb shorted to GND. Not on the regulators and connected to the CPU, among other passive components.
So all things point to the CPU. Is there a way I can have a confirmation that it is shorted without removing the CPU SoC? I don't have the tools to do it.
Thanks in advance.
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