I have a 2010 Honda Accord (4 cylinder). One day all was well, and the next was as if there was no battery at all, which is to say, no interior lamps when door opens, no horn, and certainly no sound at all when attempting to start the engine.
I tried to boost it off with jumper cables, no change.
So... I wonder if there is a "main circuit breaker" that can disable all electrics?
Any other thoughts?
Thanks,
Jerry Maddux

 

I would check the battery.

A seven year old battery might be dead.

Good luck,
Sam