Solved Flash BIOS (Windows 8.1 Lenovo B490 Laptop)

April 3, 2020 at 18:30:03
Specs: Android
Good morning
I flash BIOS(Win 8.1) Lenovo B490 laptop .installed from Lenovo support.com.
Unfortunately power on position, display( screen) black shows. Nothing will shows. Next process please

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#1
April 3, 2020 at 20:50:59
There is very little reason I can conceive to flash a BIOS on a laptop computer. The main reasons for updating a BIOS is to make it more compatible with newer hardware like CPU or GPU or other hardware compatibilities.
On a laptop the only reason would be if the manufacture service recommended doing it to fix a known issue and then only with their direst instruction to do it.
Filed BIOS updates can leave you with an unusable motherboard.
If you have a failed BIOS flash then you should contact the manufacture tech support and see if they can help you, hopefully without it costing you for the price of a new motherboard.
If there is a way to reflash it, they would know it.

You have to be a little bit crazy to keep you from going insane.


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#2
April 4, 2020 at 05:48:59
✔ Best Answer
Was your laptop connected to the power adapter when you performed the flash? Did you follow the instructions on the Lenovo website about updating to H9ET75WW before updating to H9ET92WW?

"You will need to flash your BIOS to H9ET75WW before updating it to H9ET84WW or H9ET92WW. Version older than H9ET75WW cannot flash to H9ET84WW or H9ET92WW directly. please flash the BIOS to H9ET75WW first."
https://pcsupport.lenovo.com/us/en/...

1. Locate the file H9ET92WW.exe that has been downloaded.
2. Double click the H9ET92WW.exe icon.
3. Click install
4. Click flash bios
5. Press Enter to start flashing. During the process, you are advised not to turn off the computer.
6. When the update finishes, the computer will automatically reboot for the changes to take effect.


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