It can be either POP or SVP

Only ONE way to find out for sure which one it is and maybe save a LOT of time.

First, Identify your TP model

The TP models listed on this page refer to the model number which is printed on top your TP near the LCD Hinge [not underneath] , either on the keyboard or the bottom of the LCD, it consists of a combination of letters and numbers, for example;

370C, 380Z, 380XD, 390E, 390X, 560Z, 600, 760EL, 760ED, 770 series, 770E, 770ED,240, 240X, 390E, 390X, 570, 600e, 600X, 770Z, A20m, A21e, A21m, A22e, A22m, A30, A30p, A31, A31p, G40, G41, R30, R31, R32, R40, R400, R50, R50p, R51, R52, R60, R61, R61i, T20, T21, T22, T23, T30, T40, T40p, T41, T41p, T42, T42p, T43, T43p, T60, T60p, T61, T61p, T400, T500, TransNote, W500, X20, X200, X21, X22, X23, X24, X30, X31, X40, X41, X41T, X60, X60s, X61, X61s, X61t, X300, Z60, Z61

For example a TP X20 has X20 printed near the ON/OFF switch above the F6 key.

 Your TP’s model is NOT the 2XX-XX-XXXXXX number printed on the barcode under the TP, that is the “Type” and “Serial Number”.

Download the Hardware Maintenance Manual (HMM) for your TP model

The link above is to the IBM/Lenovo site, if it doesn’t work, don’t panic, it isn’t broken, their site is shut down daily for maintenance and at those times they display spurious messages like the page you requested cannot be found, wait a good while and try again.

Using the HMM link above, once you select a model and are on the page that has the PDF HMM for that model, it is best to right click on the PDF HMM for your model then select Save Target AS, that way you will have the PDF HMM on your PC to refer to any time you need it.
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] 
Then follow the instructions for POP Removal 
After performing POP Removal if there is no password prompt icon displayed, you are done, your TP is unlocked.