Your computer is not starting up after buying a new motherboard or RAM and the DRAM_LED is on continuously. Press the MemOK! button to solve your problem.
ASUS MemOK! helps you solve the boot failure caused by memory incompatability. When the incompatability occurs, the DRAM_LED lights up. Press and hold the MemOK! switch until the DRAM_LED starts blinking and begins memory compatability tuning. When the tuning is completed, the LED turns off and the system reboots automatically.