P52 with this issue, I happened to change both the Thunderbolt & display settings of which either one will brick the machine. Obviously bad QA testing on Lenovo's end but I understand mistakes happen. It's been over a month since I sent my laptop for repair & they still don't have an ETA of when they'll have a motherboard for it! Totally unacceptable for a top tier business class workstation to have support this poor especially for a problem Lenovo knew they had mid last year! What's really frustrating is I know I could've fixed it myself without a motherboard replacement by using an external programmer to flash the BIOS but I opted to send it in thinking I'd have it back in a week or so since it's covered under warranty. Definitely should've spent the extra $300 & just bought the similarly spec'd Dell mobile workstation, lesson learned.
Two bricked in early 2019 using Lenovo update program for bios a thinkpad W540 and a W541.... I7 quad cores. The 541 was exchanged (lost a week of work) and the 540 will be out two weeks for repair by Squaretrade. Shame on Lenovo---we need a class action suit to recover lost time and business !!!!
My 4hrs old P1 died this way. Already sent this 64GB brick back to Lenovo. Also got stuck pixel out of the box on that 4K panel. Some real quality concerns.
Hint: return them as RMA and buy a new one again - while I was waiting for my 64GB config for a week they got price cut of $600. Crazy! So getting a new one now is cheaper that repairing. C'mon Lenovo, this is sub par! I'm probably staying with MacBook for another year or Razer.
Some modern ThinkPad laptops apparently have an issue with the UEFI-BIOS. When a certain setting is activated, this action can potentially brick the laptop. The only fix in this situation: Exchanging the motherboard.