怎样更换LED识别灯盘；关于替换单个的LED要从摇篮到摇篮，或者在组件失效测试后将其扔掉。
How will the LED lamp board be replaced, cradle-to-cradle regards to replacing individual LEDs, whole board, or throw away fixture after component failure?
虽然可能看起来很明显，但是全面测试这些组件，以验证当一个组件失效发生时它们会作相应的工作并维护可用性是很重要的。
It may seem obvious, but it is important to comprehensively test these components in order to verify that when a failure does occur, they do their job and maintain availability.
虽然可能看起来很明显，但是全面测试这些组件，以验证当一个组件失效发生时它们会作相应的工作并维护可用性是很重要的。
It may seem obvious, but it is important to comprehensively test these components in order to verify that when a failure does occur, they do their job and maintain availability.
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