You better try to download and run the official Lenovo BIOS.
WinPhlash Winphlash is a Windows based utility for flashing the BIOS on the TravelMate 420 series of notebook computers., Not Lenovo thinkpads. Below are instructions to assist with installing the utility and how to use the utility to flash your BIOS, should that be necessary. They may give you some clues. But I would want to attempt a repair of the BIOS with the Lenovo download. Read the instructions carefully, of course.
Here are the instructions for the Acer. I do not know if there is also a BIOS instal in Winphlash utility format for the Lenovo, but I have not heard of it, and we do a lot of Lenovo laptops:
To install the Winphlash utility, please follow these instructions.
1. Download the Winphlash utility to your hard drive from the
2. Drivers and Downloads section. Double-click on the file winphlash.exe to extract and install the application.
To use the utility to flash the BIOS, please follow these instructions.
1. You will need to ensure that you have the latest BIOS ROM file from our
2. Drivers and Downloads section. It is suggested that you you save this file to the winphlash directory, as it is required to flash the BIOS. Navigate to the winphlash directory:
C:\Program Files\Phoenix Technologies Ltd\WinPhlash\
3. Double-click on WinPhlash.exe to launch the program and view the box below.
winphlash
4. It is recommended to leave the defaults and only change the second input box.
Where it shows "Specify new BIOS file:" type in that line the name of the BIOS ROM file. If the file is in a directory other than the Winphlash directory, the full path to the file will be required. (C:\<directory name>\<filename.ROM>)
5. Press the Flash BIOS button to flash the BIOS.
6. Follow the instructions on screen. You should be prompted to reboot the system.
See how similar those instructions are to what you performed.
BIOS updates are extremely risky, and can ruin a motherboard.