I would go blank too, if I were pushed into a turn at 180K!!! Have you tried pounding on the dash when it is blank, just in case it is a loose wire?
Replacing the DIM is quite costly and there is probably a fried circuit board somewhere with a loose connection or diode. But dealers don't repair things, they just know how to R&R with new stuff.
It is like my wife's info center in her Audi, it goes blank when the temp goes above 75F. No DIY fix, and replacement is over $700.
Klaus
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Common sense trumps a PhD
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