I just tried to update the F/W in my K3S to 5.67 using the Utility (Rev 1.167.25) but it failed. The TX LED is slowly flashing, the display is off, except for MCU LD. I couldn't turn off power to the radio with the Power button, so I turned off the P/S and turned it back on, but no change. I've never had a problem before with a F/W update. Jim N7US