Hello. I have a used red sea rl90. Bought it used from a fellow reefer. Led had this horrible low pitch buzzing noise. Contacted redsea for recommendations. They recommended replacing the boards. I did that. Cost 110 total. The buzzing stopped. But I was unable to update the firmware after re-boarding the led. Contacted red sea again, They wanted me to send the light back to them. Said it would cost an additional 30 to send it in and then whatever parts needed to be replaced. I'm not willing to put in anymore money to the light after spending 260 total between the used price and boards. 120 shipped. I can include the old boards I took out. As well but the buzzing drove me up a wall. Those boards allowed the firmware to be updated. Again selling as is. The only thing I've noticed without the updated firmware is the inability to do a preview run of the program being used.
