To adjust the brightness and contrast, found itself up, images are still not enough bright, while the image is also relatively weak. 39 feet peripheral circuit, found no abnormalities, measuring voltage, 16 feet far below normal, however, because the voltage is too low, 16 feet make internal ABCL circuit and control in advance, led to the decrease of the brightness and contrast. Disconnect 16 feet external circuit, measuring voltage, 16 feet is about 6.3 V (normal), the fault is caused by an external circuit. 16 feet peripheral components, found C586 leakage, after replacement, troubleshooting.z8Bservice manual download site