6611C故障正确的电缆方向

我最近在网上购买了一台有故障的6611C，并试图让我的实验室再次运行。
故障症状 - 开启时 - 听到电源变压器通电 - 完全没有显示 - 单位拉动50W - 风扇在开关关闭时踢了一小部分它处于非常新的状态，没有灰尘等，最后一次调整2013年，没有明显标记的地方魔法
烟可能已经逃脱了。
在我连接电源之前，我想澄清内部布线方向（即看起来有人在我面前，我不确定他们可能没有正确地将它重新组合在一起）参考从A1到A2板的宽带状电缆
。
当查看“已安装”A2板的顶部时，带状电缆上的蓝色条带是否朝上。
我也可以在未安装A2板的情况下操作本机（但仍然连接）所以我可以检查手册中测试点位置上指示的基本电源轨水平，即P53问候卢卡斯



     以下为原文

  I recently purchased a faulty 6611C on the net and are trying to get it operational again for my lab.

Fault symptoms - At turn on  
- hear power transformer energise
- No display at all
- unit pulls 50W
- fan kicks a tiny bit at switch off

It is in very new condition, no dust etc, last cal 2013, No obvious marks where the magic smoke may have escaped.

Before I connect power I wanted to clarify the internal cabling orientation ( i.e. it looks like someone has been inside before me and I am not sure they might have not put it back together correctly )

Referring to the wide ribbon cables from the A1 to A2 board. Do the blue strips on the ribbon cable face upwards when looking at the top of the "installed" A2 board.

Also can I operate the unit with the A2 board unmounted ( But still connected ) So I can check the basic power rails levels as indicated on the test point locations in the manual i.e. P53

Regards

Lucas