MSI GS75 no sound and usb issue

[Jenzo]

Hi,

I have a MSI GS75 Stealth (9SD-819BE) here, motherboard model 17G11 (As far as I can tell this is the motherboard model number) that has no sound trough either it's speakers, or trough the 3.5mm jack connector. And 2 out of the 3 USB 3.0 ports don't work. At first one stopped working, a couple weeks later the second port.

Are there schematics available for this device? Or any other advice is always welcome, I have very little experience with devices other than MacBook's.

Thanx in advance!

[Sephir0th]

Re: MSI GS75 no sound and usb issue

Regarding the USB-Ports it could be a dying PCH in worst case. Basic check would be a) to check whether you have 5V at the ports present and b) to check the Data lines in diode mode to GND. They must not show a low reading nor a big difference between the differential pairs.

[Jenzo]

Re: MSI GS75 no sound and usb issue

Sorry for the very late response!

I don't get 5V on any of the nonworking ports, the diode mode readings seem to be fine (0.45 - 0.75 range).

I'll add 2 pictures of the motherboard, could you point out where the PCH is, and/or if there's any way to test it? Thank you very much for the help so far!