IdeaPad U310 touch: Can no longer enter bios after updating to latest version

I flashed to the latest U310 bios (http://download.lenovo.com/consumer/mobiles/65cn99ww.exe). I switched to "legacy boot mode" (from UEFI), in an attempt to workaround a driver issue. Now, I'm no longer able to enter BIOS whatsoever. There are plenty of forum posts by many users hitting the same or similar issues on U310/U410/U330 and similar ideapad products. But the resolutions where they exists are either invalid, or involve flashing to 65cn99ww.exe, which is not possible.
[Environment]
Lenovo IdeaPad U310 touch, Windows 8 (also tried Windows 8.1)
[What I did]
Flashed BIOS using official Lenovo bits (65cn99ww.exe). No errors occured
Enter BIOS afterwards and change to legacy boot mode (from UEFI)
[Problem]
Cannot enter BIOS to view or change any settings.
[Debugging]
Try to enter BIOS by key button sequence.
1. Tried the following combinations during bootup: F2, Fn+Fn, F10, Fn+F10, F1, Fn+F1, 'B', 'N', Fn+'B', Fn+'N', Delete, Esc.
==> No change in behaviour. I tried each many times in case the timing is important.
2. Boot by Novo button. This brings up a menu, which includes an entry to enter BIOS. However, choosing that menu entry boots to Windows
3. Reboot to UEFI firmware settings from Windows (Settings/General/Advanced/UEFI). I can choose to boot to UEFI settings, but ultimately, just boots to Windows 8.
4. Try to reflash BIOS. Fails with error 182: Version less than or equal. So reflash fails
5. Try to reflash old BIOS. Flashing fails
6. Unplug battery from motherboard for 1 minute. No difference in behavior
7. Boot with SATA disconnected.
8. Try various flashing options and alternate ways to flash. Not successful
[Conclusion - BIOS is faulty] 
I think this problem can be solved easily with a slightly newer variant of the BIOS being officially released by Lenovo. If someone from Lenovo is reading, can you please open an internal case on this.
Otherwise, I'm open to suggestions from the community. Does anyone know how I can hex edit the bios version #.
Thanks
Solved!
Go to Solution.

All,
When I navigate to the U310T (touch) on the support site, I'm not finding a BIOS update.
It may be that we have removed it.  The U310 (non-touch) does still show BIOS 65 available here for Windows 8/8.1 and BIOS 21 on the same page for Windows 7.
Is it possible that you have a touch model and applied the non-touch BIOS?
Mark
ThinkPads: S30, T43, X60t, X1, W700ds, IdeaPad Y710, IdeaCentre: A300, IdeaPad K1
Mark Hopkins
Program Manager, Lenovo Social Media (Services)
twitter @lenovoforums
English Community   Deutsche Community   Comunidad en Español   Русскоязычное Сообщество

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