Question about Compaq Evo Notebook N400c
I found this fix for your problem on http://forums11.itrc.hp.com
If you have lost your BIOS password(s), then you can clear them by removing all power from your laptop for a while.
I think you are familiar with how to enter the BIOS - but if not - look here:
You may need to consult the Maintenance & Service Guide for your N400C to find and remove the RTC battery. You can access that and all the documentation for your notebook here: http://tinyurl.com/mda9a
This is the procedure to clear the Set-up (BIOS) passwords:
(1) turn off the computer.
(2) If it was in a docking bay, remove it.
(3) Disconnect A/C Adapter.
(4) Remove main battery pack (and the secondary battery if one is fitted.
(5) Disconnect the Real Time Clock (RTC) battery from the system board. (You'll need to remove the palm rest and keyboard to do this - there are clear instructions and pictures in the Mtce & Svce guide referenced above. You should see a tiny white plug on the end of the RTC coin cell leads. Disconnect it - you do not need to remove the RTC battery.)
(6) Now wait 30 minutes. (The 5 minutes quoted by HP in some of its manuals is not enough)
(7) Press and hold down the laptop power button for 1 minute. (This is intended to clear any stray voltages or static that's still around)
(8) Reconnect Real Time Clock battery and re-assemble laptop. (BUT DO NOT re-fit the main battery yet.)
(9) Hook up the A/C adapter and turn on the laptop. System should boot up OK - press F1 or F10 while on Compaq splash screen (ie before windows starts to load) to access BIOS.
(10) All passwords should now be cleared. Check you can enter BIOS OK. It should be restored to Compaq default settings with no power-on or admin passwords.
(11) Now you can re-insert the main battery (and secondary battery if you have one)
(12) Now reset date, time and other BIOS settings as you want them to be.
(13) If you set any passwords - make sure you keep a note of them somewhere safe but outside the laptop !!!!
Hope this helps
Posted on Mar 31, 2011
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
May 29, 2011 | Compaq Evo N610C Notebook
May 04, 2011 | Compaq Evo Notebook N400c
Sep 29, 2010 | Compaq Evo N1015v (217177) PC Notebook
Mar 03, 2010 | HP Compaq Evo Notebook N600c
Dec 13, 2009 | HP Compaq Evo n400c Notebook
Nov 23, 2008 | Compaq Evo Notebook N400c
Oct 27, 2008 | Compaq Evo N610C Notebook
Jul 23, 2012 | Compaq Evo Notebook N400c
245 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: