Meal I bought a locked Lenovo Thinkpad L520 at the flea market for little money because I like to screw a bit or try to get things back, unfortunately I have never had this problem in the top left corner of the screen as soon as I turn it on a lock symbol appears and I have to enter a password unfortunately I can't get into the BIOS either and wanted to ask if someone knows a solution. I removed the old hard drive and installed a new one, so that's not the reason
This is probably a blocked bios. You can try taking out the small battery in the mainboard and the battery for a while. The odds aren't good for you though.
Sounds like a password in the BIOS. Resetten should help.
Either a small battery or a small button on the mainboard does that
So take out the battery and leave the battery on, or take out both?
Better take both out
Wait 5-10s, then it should have lost the settings
