After you've written the whitelisted edid to the panel it doesn't matter which bios version you flash; they all contain the whitelist (otherwise existing customers would complain). The only exception is downflashing to v1.19 or earlier since these versions lack the LP140WF6-SPB2 and LTN140HL05-901 edids. So ...better flash the SPB1 then, just in case you want to go way back. And do read the readme.txt before assuming flashing the latest bios is good merely because it's the latest. Dell and HP, for one, tend to pull this dirty trick: initial bios -> +1 month -> v1.1 -> +1 month > ... -> +2 months -> v2.3 -> ~3+ years -> v2.4 Thing is that that v2.4 will have no bugfixes or improvements, except for one that's only beneficial to the manufacturer; it will flip the bios eeproms bits to protected and ensure no further flashes are possible, whether that concerns older, newer or modified bioses. Even an identical version will not work, which would also prevent you from fixing a corrupted bios. A scenario like that can happen even without having a bad flash, either due to bugs in the bios, a virus or some poorly formatted piece of software or driver with low-level access.