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kenneth23Aug 9, 2025
What to do if no output LEDs are lit on California Instruments AC Power Distribution?
- LLauren ThompsonAug 9, 2025
If none of the output LEDs on the front panel of your California Instruments AC Power Distribution unit are lit, the issue lies within the DC-AC board. If all LEDs light up after powering on, replace the DC-AC module because it likely has a shorted gate drive and blown power transistors. If the LEDs stay off, replace the DC-DC board. If the fuse is blown with signs of damage on the board, do not replace the fuse; replace the DC-AC module. However, if there's no visible damage, replacing the fuse and trying again is acceptable.
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