Alright, so I have a 2007.5 and also have an MM3.
After a while, the display wouldn't turn on and would blink lights, and after unplugging it and plugging it back, it would work.
Now it won't turn on and at all, and I noticed that my battery gauge is reading low too.
Knowing that these are power-hungry trucks, I figured that the batteries were the issue.
So then, after getting a battery test, I replaced both and made sure connections were tight. Well, it didn't fix it.
I am not sure what to do as im out of things to think of.
I also got an alternator test that also came back well.
Any help would be appreciated.
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