BlackWidow Water Damage

I recently found my old water damaged BlackWidow Ultimate 2014. (model number: RZ03-0038) Before the water damage, the number pad didn't process input. I was wondering if there was any way to repair it myself, or if there is some product return program that I could use to get some credit for the physical keyboard. In addition, if anyone would like to buy this keyboard, its up for grabs. Any advice or inquiries are well appreciated.