I have read so many threads already and have tried to resolve the problem based on other owners experiences. Here is the issue. I think I left a light on (dome inside light) for 3 days. Went to start car and nothing. Used a portable charger to jump, got power to the dash, windows ect. But then drained the portable charger battery and went black. Tried jumping with another car, both front and back. Nothing. Replaced 12v battery assuming that’s the issue. No power. Only has power (accessory mode when I put the key fob in the slot.) Replaced key fob battery as suggested. Checked fuses under the hood, replaced the only blown one. (Did not check inside driver fuse box as I’m pregnant and could not get under there) Fuse did not fix anything. My brother brought over his obd II scanner and it wouldn’t even read anything as if there was not enough power to register. I am at a loss! I have had issues with the speedometer console lighting up for about a year and a half now and it doesn’t even turn on regularly. (Just lived with the issue). It’s a 2008 with over 200,000 miles. please if you have any thoughts or other suggestions it would help.