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Denise ReyesAug 12, 2025
Why is the green POWER LED not lighting up on my MGP Instruments Measuring Instruments?
- JJohn PayneAug 12, 2025
If the green POWER LED on your MGP Instruments Measuring Instruments fails to light up after applying power, there are a few things you can check. First, for the LDM 210, ensure the power supply polarity is correct on the connector jack and that the power supply voltage is within the 7-9 VDC range. Correct the polarity if needed and start the "VARIOUS TESTS" mode. If you're using a battery-operated unit, check the status of the 2 1.5 V batteries and replace them with new ones of the same type if necessary.
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