Question about Compaq Evo N400C Notebook

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Evo n400c ive brough a new battery for my laptop. on chraging it up, i booted it up and about 1 second later it turned of. please can you help

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  • bbrian Apr 05, 2008

    thank you so much for your reply.

    yes i charged the battery up over night, but when i went to boot up the laptop it jusat turns of agian.

    the battery is reading 98% full, but only works with the ac in.

    help

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Did you charge it for up to 8 hours?

Caring for your Compaq Evo N400c Laptop Battery You can improve the life of your Compaq Evo N400c Laptop Battery by doing the following:
When you first receive your laptop battery charge it fully for at least 6-8 hours and then discharge the battery fully by using your laptop unplugged from the mains until it runs down completely.

Repeat this 3 times to ensure your Compaq Evo N400c Laptop Battery will give you the maximum performance.

If you regularly use your Compaq Evo N400c Laptop on mains power for extended periods, removing the battery from your Laptop during these periods will extend the usable life of your laptop battery.

Posted on Apr 05, 2008

  • Georgia B
    Georgia B Apr 05, 2008

    Check you power settings in both the system bios and in Control Panel. Refer to your owner's manual if necessary.

    Here are more tips

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1 Answer

I had installed a bios password on my Compaq Evo N400c, which i have forgotten, i need to make my CD as 1st boot device so need to reset its Bios password.


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:
http://tinyurl.com/hlusx

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

Mar 31, 2011 | Compaq Evo Notebook N400c

1 Answer

WHAT DO I DO TO MY COMPAQ EVO N400C TO GET IT TO RECOGNIZE A REPLACEMENT MONITOR


It should have no problem ,,connect vga to vag out the back,,of evo,,should work,,also the compaq website is very helpful,,support and driver downloads for everymodel,,goodluck

Nov 19, 2010 | Compaq Evo N400C Notebook

1 Answer

I have a compaq evo n400c pc and when i switch it on it always asks for the power-on password which i do not have because i have forgotten it. how can i restart the pc and create a new password so i can...


Try booting up into safe mode and changing the account's password or deleting the account. If it is a BIOS password, then you will have to contact the manufacturer.

Dec 13, 2009 | HP Compaq Evo n400c Notebook

6 Answers

Upgrading memory on my Compaq Evo N400C notepad


i have the same Compaq Evo N400c its a ram under the keyboard check there to upgrade it i got Compaq Evo N400c 1gb ram

Dec 30, 2008 | Compaq Evo Notebook N400c

3 Answers

I have a compaq evo n400c needs a power on password key


If you forgot your password then you have to take your laptop to hp service centre. Because the laptop need to be disassembled before one can reset the poweron password.

Nov 23, 2008 | Compaq Evo Notebook N400c

2 Answers

Compaq EVO N400C PC Notebook Problem brought new battery! fully charged all night! turn laptop on within one second the thing turns off! AC works fine! new battery! old laptop! what can i do, please help?


your laptop should function even without a battery. Remove the battery you just bought and see if only with AC adapter, would your laptop turn on?

If not, then try removing the memory and see using a pencil eraser, clean the contacts of the memory and see if you can power your laptop with only ac

Apr 05, 2008 | Compaq Evo N400C Notebook

1 Answer

Evo n400c


yes it is possible
if you have operating system of xp than it will install automatically if its not done
then first you should install the driver. then you can use it.

Jan 16, 2008 | Compaq Evo Notebook N400c

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