Default Stweaks, did i burn the keys's led?

Hi
I was "joking" with voltage led in Stweaks under the BLN profile, Led Voltage Level option.
I tuned down from 3000mV to 2800mV the voltage and now keys's led return/menu don't work. They are always off...
I've already try to restore Stweaks profile but it doesnt' works...

What i should do?