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SONY VAIO

In the newer SONY VAIO Notebooks, the BIOS password is no longer stored in the volatile CMOS-area but on an EEPROM.

Jean Delvare has published his results of an analysis of various Sony Vaio EEPROM dumps on his homepage. There you can see that the BIOS password is stored encrypted in the first 7 Bytes of the EEPROM and, if no password is set, these Bytes are 00h. So if you delete the whole chip - like you can do with DELL notebooks - you should get rid of the password.

Unfortunately, this would delete all other informations like e.g. serial number, model name, etc., so that specific Sony-Applications might cause trouble or even don't accept the notebook as a SONY-device.

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