RE: XPS 9550: Latest Thunderbolt firmware upgrade destroys HDMI port
This firmware update rendered one of our XPS 15 9550 laptops unbootable. The update progress bar reached 100% and prompted for a restart. I clicked OK and the computer never booted again. It gets pas POST and the Dell logo but hangs at either a black screen or on the Windows logo with no progress. Onboard Diagnostics still work and show no errors but I can't boot from USB or from the internal NVMe drive.