Argon 40 m.2 case

I have had the case for almost a year and has worked perfectly until about 2 months ago. I have tried 3 different 4b pi’s but none will boot once attached to the board. You will see raspberry logo installing software and then the screen goes blank and you never see anything again. All 3 pi’s readily boot outside the case and connect to wifi. I tried to ssh into the pi’s but none of my router doesn’t see any of the pi’s. I thought it was the hdmi port that went bad but then i should still be able to see them on my router.