It can be either POP or SVP
Note: On some Lenovo ThinkPad models
under some circumstances a Supervisor Password prompt icon looks like
I have only seen this distinctive SVP
icon on one ThinkPad, so it is RARE for now, almost all ThinkPads to
date use the same icon to prompt for POP and SVP.
Only ONE way to find out for sure
which one it is and maybe save a LOT of time.
your TP model
the Hardware Maintenance Manual (HMM) for your TP model
Spend the time to read the first part of the HMM
which deals with Cautions some of which like for example Shock Sensors
are very important, you would not want to roughly handle your System
board to find out when you power it up to unlock it that in fact you
have ruined it.
Read the HMM section dealing with Passwords and
become familiar with how to remove Power on Password [POP]
If you have a ThinkPad that can
boot even though it has a Supervisor Password set
Removing Power On Password [POP]
will render it unbootable Until the Supervisor Password is removed AND
the correct Date and TIME are set in BIOS setup
Having first READ AND UNDERSTOOD THE WARNING ABOVE
YOU DECIDE if you will follow the instructions for POP Removal
NOTE - IMPORTANT - make sure you
do read this !!
The instructions in the IBM/Lenovo HMM regarding
POP removal are easily misunderstood.
The CMOS backup battery [small single cell lithium
battery, usually yellow colour] must be disconnected.
Main battery MUST be removed.
AC Adaptor MUST be unplugged from the ThinkPad.
In other words the ThinkPad must have
absolutely no electrical power, no CMOS battery - no main battery -
no AC adaptor connected.
Then with NO ELECTRICAL POWER at all to the
ThinkPad WAIT A FEW MINUTES just to be on the safe side.
Confirm that POP has in fact been removed;
After POP removal, connect the CMOS battery,
install the Main battery, connect the AC adaptor.
Switch the ThinkPad ON and you should see an ERROR
MESSAGE about Date and Time needing to be set.
That error message is your confirmation
of a successful POP removal.
That is NOT a real error, it simply means that
once you can go into BIOS setup you need to set the correct Date and
Time, so it is not something that is of real concern, nothing is
wrong, this is normal.
If you do not see an error message that means
that you DID NOT reset POP. Main reason is usually that you have
not removed ALL POWER from the ThinkPad, read the "NOTE -
IMPORTANT" paragraph above and try POP removal again.
After performing POP Removal
if there is no password
prompt icon displayed, you are done, your TP is unlocked, go to BIOS
setup by pressing F1 when switching ON [press ESC key to continue past
the error message] and set Date and Time then press F10 to save.