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Old 03-10-2022, 04:39 PM   #1
jimanez11
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Join Date: Jan 2015
City & State: Falls Church, VA
My Country: USA
I'm a: Knowledge Seeker
Posts: 79
Default MSI PS63 Modern MS-16S1 - No Power

Have a MSI PS63 Modern with a board number of MS-16S11. Havent been able to find schematics or boardview for this machine, but would love to try to get it fixed.

When the power button is pressed, the machine attempts to boot - keyboard backlight turns on, then there is an audible click and the board reverts to a power off state. Press the power button again and the same thing happens. Have pulled the board from the machine trying to locate the clicking noise by sound, but it appears to be coming from everywhere on the board and I cant pinpoint its location.

The board is getting 19 volts all over the place and the 3v and 5v always on are both present. Nothing is getting hot when the power button is pressed either.

When the power button is pressed, the following power rails come on (measured at coils):
- 3.3v (sitting at 1.04v before power button is pressed)
- 5v
- 1.8v
- 0.8v
- 1.2v
- Some of the CPU rails appear to receive power as well (0.8v and 1.2v)

The only rails that do not show voltage when the button is pressed appear to supply the GPU and the onboard RAM (I think) modules (Samsung 825 - K4G80325FB-HC25 chips).

The coil that supplies the RAM voltages (PL1) is measuring at ~80 ohms to ground
The two coils that supply the GPU are Measuring at 1.5 ohms to ground which is a potential cause for concern, but have seen very low resistance on newer GPUs, so not sure if this is shorted.

I am not sure if this is a bad mosfet or a bad coil, or a bad GPU or maybe a sensor of some kind that is getting triggered, but without a schematic or boardview I am kind of lost. What would the next steps be?

I have done a visual inspection and the solder joints on all mosfets look pretty good. Should I lift the coils that are not receiving voltage and see if the clicking remains? This would at least narrow it down to which side of the coil the issue is occurring.

As always, any advice is appreciated and looking forward to getting this computer up and running if its repairable.

Last edited by jimanez11; 03-10-2022 at 04:40 PM.. Reason: Adjusted title to indicate Power issue
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