The AXIS has two clips on each side attached to the thumb sticks. It has 3 pin for bi-direction. (left right or up down) You can use a multimeter tip or small metal clip to bridge the 1 2 3 pins between one another and the signal will do left right or up down. I used a app on the device as I was trouble shooting to watch the stick movements and once I came across this article and was able to get the correct part name, I was able to see how this axis part actually worked an gave it a shot. Inside the axis is a aluminum discs with a plastic mold. I had to reseat the disk using tweezer. (This requires some slow movement as you remove it or reseat it as the metal is very thin) This allowed the analog stick to zero/center itself and didn't keep it stuck to one direction again once you moved it. I found a replacement part at DigiKey "THUMBSTICK DUAL AXIS" was the search term for a proper donor part fix to replace the fault axis sensor as the SteelSeries Nimbus analog thumb is imbedded to the rocker and not screw...

Yes you upgrade the M.2 2280 to a larger size. Note you will loose the data on your current M.2 2280 drive. Only 1 M.2 2280 is present on the motherboard.

The audio jack has 3 rounded pins inside the female connector. 3 also lead in from the rear of the input. This lets the chip turns the audio build in speakers or jack on and off. Like myself. You are going to have to open it up. Inspect the audio jack. Come the the conclusion the jack numeric value is near impossible to read and hunt for a replacement. This is going to require a complete disassembly of the laptop and motherboard/pcb components from the case, and if your not confidant you can restore it… Take it to a shop that deals with electronics. New jack. Solder, Wick, Solder iron is required. + a precision screwdriver of the + variant.