Some internal components fail, for whatever reason, and nothing happens when you plug it in.
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Does the Inverter Have Power?
Check the socket for obstructions.

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Examine the socket for potential shorts due to metallic items such as paper clips or small coins.
Don’t reach into the socket with any metal object such as a screwdriver or tweezers.
You could be shocked.
If the socket is clear, plug another equipment into it to test it.
Check any in-line fuses or fuse box fuses, if present.
Was the Inverter Used With a High Amperage equipment?
Every inverter is rated to constantly provide a specific wattage level and a different level in short bursts.
Was the Inverter Connected Backward?
If you have asmall cigarette lighter inverter or accessory outlet, connecting it is foolproof.
You plug it into the cigarette lighter socket, and you’re done.
However, connecting a battery-wired inverter backward can permanently damage the unit.
In that case, look for a replacement inverter that meets the needs of your specific tool.
These units cannot handle high wattage loads, but it’s impossible to hook them up backward.
Still,installing your new inverter properlywill also ensure that it provides you with years of trouble-free service.