If its not listed there check the back of the laptop - the model should be listed on a white label there. The first 4 numbers are the machine type and the last 3 characters are the model. This lable is located on the bottom of the machine.
This sample is for one type of Lenovo - yours could look different.
How can I know my model number since the laptop is nt switching on. This label is found on the rock bottom of the machine. The cables are fine model number GL752v how to find my stolen laptop using model number. Every ThinkPad is stamped with a label identifying the machine type model and serial number.