故障现象:开机图、声正常,工作一会儿图像、声音忽然丢失,而屏幕上下为黑色边带中间显现12cm的宽白亮带,无噪波点,出现几秒钟后图像、声音自动恢复正常。据用户讲:“有时可以正常工作很长时间,故障出现后有时几秒钟可恢复,有时可长达30min(分钟),故障出现时间无任何规律性。” Symptoms: boot picture, the sound is normal, the work for a while images, the sound suddenly lost, and the screen up and down the black sidebands appear 12cm wide white bright band, no noise point appears a few seconds after the image, the sound automatically back to normal. According to the user: “Sometimes it can work normally for a long time, sometimes it can recover for a few seconds after the fault occurs, sometimes it can be as long as 30min (minutes) and there is no regularity when the fault occurs.”