Take off the keyboard (push up and lift from the bottom) Find the EEPROM (U22) Connect the power and turn on the laptop.
#Eeprom is write protected password#
When reinstalling Windows, try the Lenovo disc images, as longer battery times have been reported, probably due to custom drivers. In order to reset the EEPROM and the password on a T430s, you need to: Take out the battery. A can of compressed air may be useful too, and a bottle of isopropyl alcohol and cotton buds are good for cleaning, but not on the screen.
So as a quick breakdown of how things work, the SAMD20’s flash is organized as rows and each row consists of 4 pages of 64 bytes. The only tools you need for servicing a ThinkPad are a set of small screwdrivers and a nylon spudger (for taking the screen and keyboard bezels off), and possibly a pair of tweezers. The emulated EEPROM is addressed at the end chip’s flash memory where a FUSE byte defines protected regions of memory. Corporate bulk purchasers don't usually go for it. Not only will it have better brightness, colour, contrast and viewing angles - you will most probably more than make up the investment when selling it.
When buying a new ThinkPad, consider taking the IPS screen option if possible, as it doesn't cost much. When buying a used ThinkPad, remember to check that the BIOS is not locked with a supervisor's password and that Computrace is not enabled and activated. For the normal working, the WP pin is connected to ground in the circuit. And if a low signal is given to it, then the read and write operations are allowed normally.
For IBM/Lenovo ThinkPad laptop enthusiasts. If a high signal is given to it, the IC is protected from any write operation.