So... on my t430 i just found this on my 4mb bios chip and i have no clue of how to clean it neither what it is. Any help appreciate it... :
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![SOLVED] Remove BIOS and Supervisor Password from Lenovo ...](https://www.dataimpact.nl/image/catalog/t430-bios-dissassamble/t430-bottom-screws.JPG "SOLVED] Remove BIOS and Supervisor Password from Lenovo ...")
SOLVED] Remove BIOS and Supervisor Password from Lenovo ...
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![SOLVED] Remove BIOS and Supervisor Password from Lenovo ...](https://www.dataimpact.nl/image/catalog/t430-bios-dissassamble/t430-keyboard-push.JPG "SOLVED] Remove BIOS and Supervisor Password from Lenovo ...")
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![SOLVED] Remove BIOS and Supervisor Password from Lenovo ...](https://www.dataimpact.nl/image/catalog/t430-bios-dissassamble/t430-keyboard-pull.JPG "SOLVED] Remove BIOS and Supervisor Password from Lenovo ...")
SOLVED] Remove BIOS and Supervisor Password from Lenovo ...
![SOLVED] Remove BIOS and Supervisor Password from Lenovo ...](https://www.dataimpact.nl/image/catalog/lenovo_thinkpad_bios/t530_1.JPG "SOLVED] Remove BIOS and Supervisor Password from Lenovo ...")
SOLVED] Remove BIOS and Supervisor Password from Lenovo ...
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![SOLVED] Remove BIOS and Supervisor Password from Lenovo ...](https://www.dataimpact.nl/image/catalog/lenovo_thinkpad_bios/t430_1.JPG "SOLVED] Remove BIOS and Supervisor Password from Lenovo ...")