lenovo screen is BIOS POST (power on self tests) failing.
it means hardware failure, 99% or 1% HDD OS is corrupted.
all PCs do this at 5 years (par)
PCs fail for 2 reasons, batteries bad, or HDD bad.
2 things wash wear repeat,
made 2007. 15 years old today, and ran for 15 years and failed just now. or stored for ages and today out of dusty box it fails.
sure and sure. regardless, if not serviced,
this PC came in screen sizes, not told by you and here is the waring
in the manual of your PC.
computer is one of 15.4-inch display models,
charge the cmos clock battery for more than 8
hours by connecting the ac adapter and run bios
setup utility t reconfigure the system. (SOLDER DOWN BATTERY)
THIS MEANS I ASSUME, THAT SMALLER SCREEN MODEL
14.1-inch screen model? "SAYS SIMPLY REPLACE IT"
USES NORMAL COIN CELL. BUT THAT DOES NOT MATTER AT ALL
AS ETHER KIND ARE NO GOOD AT 15 YEARS OLD EVER.
ERROR CODE 0250? FROM BIOS IS COIN DEAD.
The cmos coin cell battery must be replaced, if this old.
the coin or the solder down model 15.4"
the PC must run on AC power, no HUGE battery instelled
and 15.4": model the coin is rechargeable and soldered down.
the manual tells you shop service needed for the 15.4" model
the 14" is easy fix. if handy with a screw driver.
here is the 14" solder down ML1220 battery
SD, n200 real., see the blue rim (bingo soldered down)