Key will not turn in ignition , tried both keys, neither one works, could the battery be dead in the key causing this condition?
if the key doesn’t turn, it won’t display any warning lights!
If both your keys are not working it is most likely a bad EIS.
I don't think it is the battery in the key. Unless you have keyless go and both keys are dead.
Have you checked the main battery? Or try jump starting the car from the jump terminals in the engine bay even if the car seems to power up.
Let us know if jump starting helps.
On a side note. Do you have a good scanner? Star diagonstic?