No Power at all

The Laptop has no Power. Tried other adapters that work and power indicator light does not turn on. Tried SMC reset and that does not work without power. What else can I do? Also foreseen I have to send for repairs how can I backup the SSD?

I can't thunderbolt it to my imac because it is dead. I can't retrieve SSD to my USB dock for drives, it is not an ordinary drive.