That sucks!! Hope ya get back up soon!
Because it's Dell they have proprietary power supplies and MBs, therefore it's in the shop running test to figure out what's bad and what's good.
That strike happened 70ft from my window. White bright and loud AF. I saw it happen, I knew before the lights came back on the PC was toast.
I'm praying it's just the PSU. More so praying the SSD and HDD didn't cook.
Surge protectors DO NOT WORK, period. In our sound systems we have rack mounted power conditioners, expensive. Best Buy sells an inline power conditioner for $100. I didn't have one, YET. When it takes a surge you throw it away, but it can save $2k worth of hardware.
One way or another I'll be back up and flying, even if I have to buy a whole new tower.