Thunderbolt display multiple problems

just as has happened with my MBA and another MBP in the family, a T-Bolt display has gone downhill less than a month out of warranty. (The laptops required expensive repairs.) One day recently the display brightness  diminished suddenly  to much less than the MBA 13" sitting beside it. And now when I plug the MBA back in to the display, the latter fails to illuminate. So I have to fiddle around with (un)plugging and restarting to get my dim display to come on. This is definitely not because of low power from an outlet. Hopefully, there's some sw solution.

I found an extra thunderbolt cable I had from a portable tb drive. Plugged it in to the open port on the display and lo and behold, it works. So I guess that means the cable assembly built in to the display (that splits between tb and power connector) is the defective part here. anyone else had this problem?

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    Don't use CAPS it is
    SHOUT
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    'Netiquette -
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