Please help - Razer Core X Chroma not working

bumping

You seem to be experiencing something similar to what I am experiencing, the main motherboard of this external GPU has received some kind of shock, and components inside no longer function properly.  

Since this is happening in a number of cases, I am concerne that this is related to the PCB design issue, or a series of components that are causing this behavior.  

To check the voltage, you wil need to probe different traces on the board to see if power is making it from one part of the board to the next.  This is usually not something a consumer would do, so I advise viewing a few viedoes on it before you begin.  There is a layer of conformal coating you have to get through before you can touch the trace, or leads to track what is happeningelictrically on the board.

Based on your description you want to start where the board is attached to the USBC conector - if you are seeing not change when you connect a known-good USBC cable, then the USB traces from the port, to the USBC controller (notice it’s TI part , here’s the datasheet : https://www.ti.com/lit/ds/symlink/tps65983b.pdf ). Picture - 

Look to see if there is an obvious scorching on the chip, or if it has “bubbled”. This will indicate the chip is dead, and need to be replaced.  If you have a thermal camera, run the external enclosure and see if there are any “hotspots” on the PCB, if there are, these are your next places to look for problems.

On my board, one of the inductors is getting warm -- indicating that I likely have a DC to DC power issue ( one voltage to the next ).  It could be a few different components, but this means my board is likely having a power delivery problem, causing chips to “drop out” occassionally -- yours may be the same, except in a more advanced state - the power delivery could be completely dead - a hot component on the board will help you find that short and it can be replaced by a skilled technician.

Hope this is helpful.

My other thread as well --