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I have an old acer extensa 4620Z which I just disassembled, removed the CMOS battery and reassembled and it's still asking for a password.
One thing I read is that you should leave it for 10 to 15 minutes, I left it for a 3 - 4 minutes, can this actually make a difference, if it has no battery, then should it matter if it's 10 seconds or an hour? Does this have any merit?
Other than that, I'm stuck, what can I do about the BIOS password?
Of course it makes a difference. There are various capacitors present in or near this circuit. – Daniel B – 2015-03-22T20:54:36.027