Thank you, ejn63
During the update bios, computer show black screen. (More than 30 minutes)
After wait more than 30 minutes, I turn off computer and disconnect from power source.
After power on the computer is show blank screen.
How to recovery old Bios.
It depends on where the flash failed. The definitive ways that WILL work:
Find a shop that can remove the BIOS chip, flash it externally and re-solder it, or
Replace the mainboard.
The possibly time consuming and unlikely to succeed way: