turn it on, and then try a hair dryer on it for a few minutes, some lasers won’t turn on when cool.
+1 w/ what Brian said.
FWIW: I thought I had a broke gauge as well. Turns out it was not working during one of the cooler months in FL. Has worked fine once it was warm.
Huh. You guys are right. It’s hot as hell here in Los Angeles today. I just went out to the garage and tested — both gauges are working now.
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