JimmyHo. The issue wasn't simply from updating the BIOS, it is from skipping a large number of updates. Commonly the people you see reporting the issues from updating were due to jumping a large amount of updates, specifically the updates listed as Urgent. As each of the BIOS updates builds off the last, so skipping you can lose essential parts of the BIOS updates. With going from 1.1.1 to 2.8.0 you jumped 11 or 12 updates, so unfortunately it sounds like the BIOS is now corrupted, which would require replacing the motherboard.  Let me know if this helps, despite not being what you were wanting to hear. 
I have just updated my BIOS on my T110ii (from 1.1.1 to 2.8.0) (because I've been getting some crashes which should be fixed by some intel microcode updates). However, after the update it fails to boot and is displaying the "3" diagnostic light with no output on vga or ipmi. Sequence is: * 3 diagnostic light comes on * For a short time 1 and 4 come on as well, and fan goes to max rpm * Then just 3 remains on and the system health indicator flashes amber. The documentation suggests this is CPU failure, but this seems very unlikely since it was fine before the BIOS update. I've tried clearing the NVRAM and disconnecting everything I can from the motherboard, but that doesn't help. Is there anything else I can try? Are there any known issues with updating from 1.1.1 to 2.8.0 ? (I couldn't see any in the documentation). I did find a few other threads where people have had systems which no longer boot after a bios update, so I wonder if there is some underlying issue.
Failing to boot after BIOS update on T110ii