CMOS Password reset for nc6400 Laptop (5712 Views)
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Occasional Visitor
Eric Daniel
Posts: 2
Registered: ‎03-10-2009
Message 1 of 7 (5,712 Views)

CMOS Password reset for nc6400 Laptop

1) Turn off computer
2) Disconnect AC adapter
3) Remove battery pack, and remove the laptops keyboard
4) Disconnect RTC (Real Time Clock) battery (located underneath the keyboard, the red/white wire)
5) Leave off for five minutes
5a) I reconnected the AC adapter and powered on the laptop at this stage (before RTC battery was re-connected) This wipes the CMOS memory.
5b) Turn off computer.
6) Reconnect the RTC battery and reassemble the laptop
7) Reconnect AC adapter (DO NOT REINSERT ANY BATTERIES AT THIS TIME!)
8) Turn on the computer and enter the BIOS by pressing F10
9) Set the new BIOS password (if required) and save all settings.
10) Turn off the laptop and reinsert the battery
Occasional Visitor
Jesus Z. Sanchez
Posts: 2
Registered: ‎09-04-2009
Message 2 of 7 (5,712 Views)

Re: CMOS Password reset for nc6400 Laptop

Didnt Work :(

I've done this several time. I even tryed leaving it disconnected overnight... still, no luck :(

Any other ideas??
Occasional Visitor
Eric Daniel
Posts: 2
Registered: ‎03-10-2009
Message 3 of 7 (5,712 Views)

Re: CMOS Password reset for nc6400 Laptop

Hi Jesus

I have just "dismantled" my nc6400, and the only thing different that I did from the steps outlined was that I removed the power after Step 5b. I reassembled the laptop, then followed the steps. It works fine for me. I tried a few different forums, but could not locate anything which provides a different process.
I will keep looking for you though ;)
Good luck!
Occasional Visitor
femaradi
Posts: 1
Registered: ‎11-28-2012
Message 4 of 7 (3,112 Views)

Re: CMOS Password reset for nc6400 Laptop

Worked fine for me..

Regular Advisor
Nikhil_HP
Posts: 144
Registered: ‎11-15-2012
Message 5 of 7 (3,103 Views)

Re: CMOS Password reset for nc6400 Laptop

you can also try Shorting the pins of the RTC battery holder ot the plug point on the systemboard. 

 

NOTE: make sure you perform a power drain before this and also make sure the battery is disconencted. Do not short the RTC battery terminals.

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Frequent Advisor
RE051ST
Posts: 33
Registered: ‎08-31-2012
Message 6 of 7 (3,090 Views)

Re: CMOS Password reset for nc6400 Laptop

Note to all !!!

 

If "Stringent Security" is enabeled then removing the BIOS battery will do nothing.

 

Have tested on many models.

 

Sorry.

 

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Rainald T
Posts: 13,839
Registered: ‎10-22-2002
Message 7 of 7 (3,087 Views)

Re: CMOS Password reset for nc6400 Laptop

!YES!

"Stringent Security" is one of the features. It disables the CMOS-reconfiguration.

 

Rainald

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