SKhynix SC300 M.2 2280 512 GB. There is no doubt this is not working. I've tried plugging it into a PCIe adapter card, USB adapter and now a SATA adapter. In the thermal the SH878104AA chip just gets a little warm. I tested all caps for any shorts and see no issues there. No missing components. No corrosion. My only guess is that this is a controller chip and would need to be replaced? I did already order a duplicate SSD that has that same chip. Not sure if that even works? Does it hold TRIM data? Just not sure on this. I realize this is a M+B key mSATA and I have plugged it up properly into the correct adapters that support it. I do run a professional computer and mobile repair shop but I'm limited on advanced data recovery. I don't have much experience and don't have pro tools. Willing to learn and invest. Any help or advice very much appreciated. Thank you in advance.