Cyberlight SV & Turbo - No Power

Hey everyone,

I recently acquired some HES Cyberlights, a mix of SV & Turbo models, all are in great condition except for 2 of them, they have absolutely no power.

I've popped the hoods and checked the fuses, all appear to be completely fine, no fogged or blackened fuses, and the PCB's show no signs of damage or anything unplugged but they are just completely dead, no power at all :(

Anyone have any ideas?
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