Rather urgent request because this vehicle is for sale and we may have people coming to look at it this weekend. I am unable to gather more data or take a look at the vehicle again until tomorrow evening as I am at work at a remote site. I would have to ask my wife to gather any more information that may be helpful, after she gets home from work tonight. 2004 Acura MDX, approx. 190k miles. Vehicle has been well-maintained during our five years of ownership and all problems were addressed as soon as they popped up. Nothing like this has happened before; this vehicle has only needed basic wear items replaced plus a new heater/blower motor last winter. The vehicle was kept as a spare/weekend hauler and needs a new exhaust and new brakes, which we are unable to afford at the time, so that's why we are selling it. Car was running and driving normally when last driven about a week ago. Today I went to start it to get gas and gauges lit up but it wouldn't start. I thought perhaps the battery was dead. Hooked up to a charger which read 12.3V and 60% charge remaining. I charged it completely. Attempted to start again and had the same result. I noticed the green "key" warning light was on. It stayed on and blinked after turning the key to the off position. Checked the manual and it indicated a possible problem with the anti-theft system. I tried all three of the keys that we have and the result was the same. I did some reading online and most seems to be owners speculating over the cause and remedy with very few facts. It also seems there are no recent discussions of this problem. This is why I am motivated to ask the brain trust of BITOG for some concrete information. The most useful thing I saw online was someone saying to remove the key from its keychain, put the key in gently and not forcefully, and then try moving the steering column while turning the key. I tried all of those things with no luck. Any assistance is very much appreciated!