I brought back a tv to my home so I could test other devices.
My WiiU is fine.
My Internet TV box is fine too.
only the PS4 is dead (and likely the PC graphic card too, if it's related to hdmi)
my TV have 2 set of 2 hdmi plugs, PC+PS4 were together, internet tv box was alone. (wiiu and PS3 weren't connected)
both sets are dead, but only the connected device on set1 are dead.
Maybe it originated from the PC, the graphic card over surged the TV, which broke the PS4 and the TV hdmi card. (just assumption, I still don't kow about my pc graphic card or power supply)
I didn't open my computer yet, I'll probably test that today. (I fear it will be dead, and I'm fearing discovering it, but I'll do it today)
I hope it's "only" the graphic card, and that my hard drives are still good, though I think one (or more) is dead as I heard a bad grrrrrrrrrr noise coming from HDD bay when trying to power the PC.
I disconnected them for further tests, but I think the worst is done.
All my data are on internal hdd (I dont have a NAS.. yet, I will try to setup one after that incident)
I'll probably buy a new TV that's the occasion to go 4k ! and a PS4 Pro (4k occasion I guess).
It wasn't planned, but it's a little forced now. I will still see how I can send the console to Sony for repair, in europe it's still in the 2 years of warranty
all my info an passwords are stored in the console, I guess I should change it before sending it.
all shops seems out of supply for PS4 Pro... need to wait March.