Random warning chime and display blink

Old 01-01-2019, 08:32 PM
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Random warning chime and display blink

Hi! Have recently been noting something that I had not experienced before. While driving the car, I will hear the warning chime followed by a quick blink of the display system. No warning lights come on and everything goes back to normal. Has happened 3 or 4 times now on a long road trip I recently took. Basically, highway driving for a few hours and I will hear the chime/beep and a quick blink of the display and everything back to normal. I had a new battery and a new ignition coil put in a week before the trip. Any ideas as to what might be triggering this?
A couple of other things that seem to be happening after getting the above repairs is a noise coming from the AC/heat when turned on and a general burning smell from under the hood. Wondering if all these are somehow connected? It is an 07 TSX with 175K miles on it.
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Old 01-02-2019, 06:52 AM
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I had a similar issue. The car had been fine. Drove it on the interstate for a while, got off the exit and everything started blinking. The negative battery cable was slightly loose I'd start checking connections.
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