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How to remove or get by a cmos password on a sony laptop

Rcorn8559
Rcorn8559 asked
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Last Modified: 2012-05-06
I am working on a Sony laptop and found out it has a cmos password and no ones knows what it is. How can I get around the password. I'm not sure of the o.s. because I haven't been able to boot it up.
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Commented:
you can't...there are ways to temporarily short the chip with two wires(which can damage computer), but usually the chip has to be replaced ( not the processor, just a chip that holds cmos for better security).  Otherwise, call Sony and see if they will help you but you will have to supply...

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Commented:
proof of ownership
Rob HutchinsonTech Lead, Desktop Support
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Commented:
Ask the owner of the laptop?

If they do not know it, then you will have to take it apart and find the clear CMOS jumper or remove the motherboard battery.

Commented:
laptops don't have jumpers like desktops...links where i was involved with solution so you can better understand bios/cmos pass..I have more coming
Rob HutchinsonTech Lead, Desktop Support
CERTIFIED EXPERT

Commented:
@silemone
Some laptops do have jumpers, I have seen them, but they will not look like your normal motherboard jumper. They are usually two solder points that have to be shorted out...but then maybe I'm remembering too far back and they no longer make them that way.
Rob HutchinsonTech Lead, Desktop Support
CERTIFIED EXPERT

Commented:
Did some research and it appears that some laptops can have their CMOS cleared now by removing the laptop battery, and then the "backup" battery which is usually difficult to get to.

From an IBM laptop service manual:(Guessing Dell's are not that much different...don't have a Dell service manual)
1. Turn off the computer.
2. Remove the battery pack.
3. Remove the backup battery.
4. Turn on the computer and wait until the POST ends. After the POST ends, the password prompt does not appear. The POP has been removed.
5. Reinstall the backup battery and the battery pack.

Commented:
WireDnet, oh...you mean shorting the board...see my original post as I did point this out as an option, but with the expense of maybe damaging the board...even most techs avoid doing this for fear of damaging the motherboard...the would rather the tedious task of removing chip and soldering (the tedious part since paths on laptop take really precise soldering) a new one on.
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