@zmentz it does not have a separate inverter. The circuitry for your backlight is part of the motherboard. You would have to take a closer look at the motherboard and all connectors etc. There “might” be schematics available that may give you some clue as to what may have failed since it could be the backlight strips inside your laptop screen which may have failed or it may just not get any power from the motherboard etc. . Let us know what exact numbers are printed on your motherboard.
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=== Update (10/25/2020) ===
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@zmentz this would be the schematic around the LCD connector. Looks like lots of fuses on this board that you may need to check.
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[image|2240196]
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For better visibility, download the picture and use a graphics viewer to resize it. :-)
@zmentz it does not have a separate inverter. The circuitry for your backlight is part of the motherboard. You would have to take a closer look at the motherboard and all connectors etc. There “might” be schematics available that may give you some clue as to what may have failed since it could be the backlight strips inside your laptop screen which may have failed or it may just not get any power from the motherboard etc. . Let us know what exact numbers are printed on your motherboard.