Update on my earlier post:
Finally received my X60T back from Lenovo after third (yes third!) service call.
Service #1: sent to Lenovo because computer exhibiting exact problem described in this thread. When I got it back, the problem was WORSE! Lenovo replaced/repaired hard disk caddy and monitor hinge and something called a planar yonah. Where the screen flicker and shutoff was previously intermittent, the newly serviced computer exhibited the problem much more often. wtf?! Not sure why, but returned to Lenovo.
Service #2: Lenovo replaced the lcd cable, hinge and protection plate. Lo and behold, no more screen flicker and shutoff problem! Used continuous for 3 days with no problems..but new problems became apparent: fingerprint scanner, tablet function and status displays for battery, etc., no longer functioned..wtf?!! Sent to Lenovo again.
Service #3: Lenovo replaced/repaired system board and updated the bios/embedded controller. Now the computer works as intended. No flicker, no shutoff, nothing. Been using for 1.5 weeks and I'm happy I stuck with Lenovo. Had this service call failed, I would have smashed the notebook and shipped it to their corporate HQ with my regards.
I know this experience is contrary to what most believe in this post. I document it here only because it may be an option for those who have tablet versions of the X60 and/or still have warranty remaining on their computer...Again, my case may be unique, but I submit it as my experience with this vexing problem. I'd rather spend Lenovo's money to fix my computer problem, not the other way around.
Lenovo, for all their perceived evil in disregarding this problem, spent much more than my computer is worth and they repaired it. Aside from some blunders, the customer service was excellent and turnaround times were amazingly fast. I give credit (and criticism) when it's deserved. Good luck to all.