长虹PT4206等离子电视,伴音正常,菜单与开机画面(厂家LOGO)也正常,如图1所示,但在TV、AV等状态下显示的图像呈负像,如图2所示。该故障的原因是电源板上的三只电解电容鼓包,如图3所示,换新即可。 |
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