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Old 03-21-2022, 09:20 PM   #7
Join Date: Jan 2015
City & State: Falls Church, VA
My Country: USA
I'm a: Knowledge Seeker
Posts: 79
Default Re: MSI PS63 Modern MS-16S1 - No Power

Had some time to do some tests tonight after replacing the shorted mosfet on the 19v rail. Lifted the coil for the 1.05SUS power rail (at least to the best I can tell based on a schematic for a MS-16R11 which is somewhat similar) and the immediate power down / clicking issue went away. The chip that generates this rail is an NB685GQ (datasheet is included here as well). This rail is reading at 300 ohms to ground on the consumer side when lifted and 270 ohms to ground when soldered on to the pad. Not sure if this would be a case where voltage injection would be useful if it is a partial short? I do have a bench power supply, but generally refrain from injecting voltage unless I am guided that direction by someone who knows more.

Any next steps are appreciated.
Attached Files
File Type: pdf NB685GQ - AKUK - RAM Power Controller.pdf (1.49 MB, 5 views)

Last edited by jimanez11; 03-21-2022 at 09:22 PM..
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