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XPS 9550: Latest Thunderbolt firmware upgrade destroys HDMI port


Dell just release a new Thunderbolt firmware ,A07

I installed it, and it seems to have destroyed my external HDMI port.

I tested it with different monitors and cables.

On some monitors the colors are inverted (white goes black). Some monitors don't display anything.

I hope the upgrade caused no hardware defect to the HDMI port.

Unfortunately I cannot find the old Thunderbolt firmware to got back.



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