I just tested the non-tablet X60 LCD acble on X60 Tablet board and it shuts off after 1 second when turned on, even without anything hooked on the cable.
After I flashed notebook X60 bios image onto Tablet board, it worked fine but few LEDs (AC, BATT, numlock, capslock, sleep) do not work and unfortunately thinklight [b]does not work [b]either. Wireless, WWAN, circled Z and HDD led work ok.
I studied the schematics and compared boards and there are some components missing (like gate drives and resistors) on tablet board. So I soldered as many as I could find at first glance and got the AC icon working but no other icons and no thinklight.
I don't have actual experience with X61 tablet and notebook boards but schematics show differences in assembly on those also.
FPR and Bluetooth modules work without a problem.
P.S. I'm typing this on the hybrid X6x: X61 that got X60 Tablet L7400 board + SXGA+ screen conversion. Nice thing is that with the oversized X61 heatsink the L7400 is so cool that the fan pretty much never comes on and stays under 50 degrees C with tpfc.
X60T:L7400,4GB,F3507g,64GB Crucial C300,6200N,SXGA+
X32s:PM 758 LV CPU mod,2GB,64GB microSATA SSD,COM mod,IPS