One of my modded gridseeds quit yesterday. There's no real obvious signs of a short or any damage.
The fan doesn't spin. When I plug in 12v the fan moves a fraction. USB seems to work.
If I plug this gridseed into the psu with all the other gridseeds the psu shuts off.
Would a failed mofset mosfet cause symptoms like this? I ask because there is a very small bump on the top of one of the mofsets mosfets.
Any ideas?
Are there any tests I can do?
Probably went bad because they're mofsets

You have a short! If there is a bump on the FET, rest assured, it's TOAST!
Time for a replacement or perhaps just buy another pod...I hear their selling for less than $50 on eBay now.
Or, just wait for Flower to 'FINALLY' release their 10MHs pods and buy them.
The seeds are pretty well all done as of now, no thanks to alt coins halving in value a few times by now..
I mean, mine are making me a whole 25c/day each in DOGE now! WOO HOO!
Actually, I'm mining fresh new coins like VirtaCoin which are paying a lot better, once it gets on the exchanges that is

DOGE to the moon? I don't think so...
Woof Woof!