I have an HP Elite 8300 motherboard that I purchased off of ebay that worked great for all of about 10 minutes and then released the magic smoke on a MOSFET (RJK0389DPA). The board was on an insulated surface with a known good power supply.
It's past the return point because I ordered it before several other parts that I ordered much later before I could test it.
I want to hopefully determine which direction from the chip to look where there could be a problem. There are no schematics for this board so I'm working blind in that respect
Right now the board powers up and I see the BIOS text for about 3 seconds and then the board powers down.
Here is the datasheet:
https://4donline.ihs.com/images/VipMasterIC/IC/RNCC/RNCCS17891/RNCCS17891-1.pdf?hkey=EF798316E3902B6ED9A73243A3159BB0The Magic Smoke hole appeared between Pin 4 and 9.
Based on the design with the two internal MOSFETs are they trying to spread the load or something else?
I've attached a picture of the board (not my exact board but an identical one)
All 12 MOSFETs in the top right corner are identical. I'm guessing they are lined up with the inductors that they are feeding into it and then the CPU.
http://imgur.com/a/OJxTs