This machine is used to control another identical CPU types of TV role, the remote controller is a good image, observation, found no significant interference lines moving from lower to upper machine, suspected motherboard power supply filter capacitor is bad, the measured capacitance c807 (100uf/400) voltage is only 230V, it is with the mains voltage at the same, the fault normal, replace the capacitor, remote control back to normal, but not remote shutdown (can only turn off character, sound, still image), with no power indicator light of this phenomenon, check the standby r823 supply (12k/ 3W) has been open, change, remote shutdown the power indicator light the two, troubleshooting, repair.WM2service manual download site