Lenovo ThinkPad T450s BIOS (help needed)
 

When I press the power button on my Lenovo T450s I get two errors:
0271: Check Date and Time settings
0251: Check CMOS Checksum bad - Default configuration used
Press Esc to continue or F1 to enter Setup

After I press Enter there is a password entry screen to access the BIOS. If I just press Enter I can enter BIOS but many options in BIOS are disabled. I remember my HD password but I can't remember the BIOS password and I lost the papers that came with the laptop.
Anybody here have any suggestions/ideas/advice what I can do to recover/reset the BIOS password?
Any help would be greatly appreciated.

- remember the pass
- replace the whole motherboard
- find a local 3th party service center and pay for the removing
- disassemble the notebook, desolder the bios flash or the bios stroage eep, dump it and find your pass hash, brute force or delete (chks recalculation need)

Bro change CMOS BATTERY

yeah
after that pls tell me how can you enter the bios without password. And i almost forgot this one little buddy here