Observation is always fixed image and sound sometimes normal. The causes of the failure, emphasis should be placed on the CPU bus to the relevant circuit, high-frequency head bus in high frequency head after receiving less than change channels from CPU instructions, will work in the original state. The CPU and memory of normal work order screen characters with the remote control instruction. Final inspection for the failure of high frequency head, new circuit TV sets produced by fault according to repair before ideas sometimes doesn't work, will learn to contact troubleshooting to solve the problem.eNfservice manual download site