Dead corsair k70 keyboard

[LV]

Hello, i have a undetected corsair k70 keyboard which i am trying to repair but i can't find the issue all solder joints are good +5v goes to all the chips.

 I don't really now where to look at now.

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[HobGoblyn]

Did you try resetting before taking apart?

Unplug from PC, hold escape down, while still holding esc plug keyboard back in.

About 5 seconds after plugging back in, release escape key and it should spring back into life (might have to try two or three times).

I use mine (K63 but reset method is the same) wired on PC and Bluetooth elsewhere, quite often if I’ve been using it in Bluetooth mode, the PC won’t recognise it until I reset it.

[LV]

I've tried it many times 
the keyboard is drawing 28mA which doesn't seems rights

[zzattack]

Why not? Have you reloaded the firmware on it? Can you get it into bootloader?

[LV]

you're right 28mA may be fine since the leds are off.
I don't know how i could do that