Checksum Bad Error
“Cmos checksum bad”
error happens when the commands saved in the BIOS doesn’t
wok properly or it is ruined. Most of the time, computer
itself will come up with the message "CMOS checksum
invalid, default values loaded". Actually, all
the instruction for hardware devices is saved under
the “checksum” program. Then, the checksum works with
CMOS. With the help of BIOS, system at last turns up.
CMOS is known as complementary metal oxide semiconductor.
We can trace the “cmos checksum bad”
error if the computer is showing invalid date and time.
This could be considered as a minor issue. It can be
resolved by replacing the battery but situation may
turn out to be worse if there is no boot. However, we
may see errors from the BIOS mode itself and that would
look like "cmos checksum bad error”,
“wrong CMOS settings”, “CMOS battery error” or “CMOS
read error”. Moreover, we may see a blue or a black
screens while the loads the operating system.
If there is an unexpected shutdown of the computer or
if the drivers are not working as per the system requirement,
we will again see the “cmos checksum bad”
error. This might have happened because the device programs
which are no more in the system. When ever, the CMOS
battery is expired, we see these issues. By simply replacing
the battery, we can make the system better. If it still
continues, than we should restart the computer for couple
of times. Then, we need to access the BIOS and set the
settings as defaults. Otherwise, we need to the change
the CMOS battery from the mother board itself. However,
that should be done under expert supervision. After
the replacement of the battery, computer would be free
from cmos checksum bad error.