Commissioning has not found the first failure phenomenon, but found that lack of blue casing during vibration, namely the second breakdown phenomenon. For the second failure phenomenon in general is good, but for the first failure phenomenon, involves many part of the circuit, commissioning and tried out fault, maintenance, where to find? In fact this two kinds of fault coincides with the failure characteristics of the machine (new the TDA machine) : just boot if a cathode not launch or weak, will cause the black screen, silent (possibly joint operation failure, no characters and other symptoms); If the normal work after a cathode not launch or weak, it only show the lack of color or color blindness. That is to say, the two kinds of failure phenomenon is likely to be a failure. Open shell posterity to disconnect the blue cathode, it is proved to be the tube filament, bright, black screen, silent character display and can be manipulated. Asks the user, "dawn" when there is a character, can change channels, so the judgment and correct. Repair welding depending on the block and the main chip pins are desoldering (phenomenon), after a knock shock test phenomenon of lack of color no longer appear, troubleshooting.EAUservice manual download site