Question about HP Compaq Evo Notebook N600c

4 Answers

My Compaq N600c is asking for a PowerOn Password. I have done internet searches and all suggest removing cmos battery however I have had motherboard out but there is definitely no cmos battery. I have found a block of config pins. Has anyone any suggestions please?

Posted by on

  • 7 more comments 
  • Marc Knight
    Marc Knight Dec 31, 2010

    Compaq N600c. Asking for Startup password. No cmos battery present. Has config switch block. I have scoured www, all suggest removing cmos battery. Followed several manual images and instructions but found no cmos battery where manuals suggest, ie, under memory dimms etc. Motherboard completely removed but still no cmos battery. Therefore I conclude no cmos battery exists. Any suggestions please specific to this problem, ie, not general suggestions. Ty

  • Marc Knight
    Marc Knight Dec 31, 2010

    Hi and thanks for trying to help, There does not appear to be a cmos (RTC) battery. Believe me I am not a fool. I have searched everywhere. To confirm I know what I am saying, I bought this N600c MB to replace a faulty N610c. I have experience in building desktops and repairing laptops. Although both MB's are slightly different, a cmos battery is a cmos battery.

    The design on the N600c adds a dimm slot and covers the area where the cmos battery is on the N610c. I have literally scoured millimetre by millimetre and found no battery. I understand there are some MB's that do not house a battery and instead use some other form or componant.
    This particular MB has config switches, the type house in a small black plastic block and I wondered if they would be there for the same purpose but I guess not.

    The MB is currently out of the case awaiting a solution. Would you like a photo of it to show you there is no cmos (RTC) battery where all pdf online manuals state and not elsewhere.

  • Marc Knight
    Marc Knight Dec 31, 2010

    Hi, sorry if I gave you the impression I took insult. I didn't. I am simply venting my frustration with this lol.
    Ok part number, i think this is it - PCB-PC7538 MB-41A-Ver 1.0. I'm not sure if the PCB at the beginning is relevant, it is simply stamped as such at the beginning of the number which is all in white.
    There is a white sticker above the number with the following number on it PC 7526

    Additionally there is a 10 switch dimm on the side of the MB close to the relocated bios chip, I say relocated as the chip is in a different location to that on the N610c.

    Thank you for your efforts.

  • Marc Knight
    Marc Knight Dec 31, 2010

    Hi, I am not sure if you got my message as it has cleared since I refreshed this page. I did not feel insulted so I apologise if you thought I did. I am merely frustrated. The part number, as printed on the board is PCB - PC 7538 MB - 41A - Ver 1.0, although I am not sure if the PCB is relevant. Also there is a white sticker above this number with PC 7526 printed on it. Thanks for any help and apologies again.

  • Marc Knight
    Marc Knight Dec 31, 2010

    No me neither. I read a post where 1 user suggests shorting 1st two pins on each side of bios chip. I will do so only as a last resort. I think I have found the bios chip but I am currently looking for a schematic. I did find some that are for sale but I'm not sure if I am reading it right. I suspect you will be celebrating the new year, as I probably "should" with my wife. So I'll shut down in a couple of hours. Happy new year.

  • Marc Knight
    Marc Knight Jan 01, 2011

    Hi Sheila,
    I have taken this up with 2 others and believe me, there is no removable cmos battery. Apparently some MB's have them soldered on. The trick is identifying it, but even at that, as it can't be removed therefore it can't be achieved. I am still seeking a solution. This particular n600c MB has dip switches on it in a small black plastic box.
    I have been building pc's for years but always left laptops well alone as I knew they where trouble. Only recently have I had reason to have a go as I bought a n610c with a faulty MB that does have a removable cmos (RTC) battery, however this particular MB (the n600c) believe me, doesn't. Any other suggestions would be gratefully received. Happy New Year.

  • Marc Knight
    Marc Knight Jan 01, 2011

    I have only gone and solved it. As a last ditch attempt I scoured youtube and found an msi promo video which reminded me that some desktops have a reset switch for cmos. I remembered that I had found a push down switch on the n600c close to where the cmos battery is on the n610c. I help it down for 10 seconds, reconnected the monitor, powered on and hey presto you beauty.
    Anyway, since |I signed up here I have decided to offer my services, maybe not on an expert level, but if I can help I will.

  • Marc Knight
    Marc Knight Jan 01, 2011

    I have only gone and solved it. As a last ditch attempt I scoured youtube and found an msi promo video which reminded me that some desktops have a reset switch for cmos. I remembered that I had found a push down switch on the n600c close to where the cmos battery is on the n610c. I help it down for 10 seconds, reconnected the monitor, powered on and hey presto you beauty.
    Anyway, since I signed up here looking for help, I figure i may be able to help others too.

  • Marc Knight
    Marc Knight Jan 03, 2011

    Hi. It seems no-one else knows this, but I found it by accident following viewing an MSI promo video on youtube, it hinted the solution. Not all MB's have the removable cmos battery. This I already knew but what people may not be aware of is that this MB and the n610c and probably others, have a small switch (lever type) that you press in order to clear bios. This switch is even evident on MB's that have the removable cmos battery. Press it for 5 seconds and hey presto. I felt like I had discovered the wheel all over again. So file that in your brain in case you need it again. FYI the switch is located on the front top side of the MB to the left of the headphone socket. The lever itself is black plastic encased in a small metal oblong box approx 1cm by 1/2cm.

×

4 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 2,653 Answers

Here's a link to the service manual.

Take a look at page 82. Tricky place to hide a battery.

Hope this info helps!

Posted on Jan 01, 2011

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • HP Expert
  • 2,973 Answers

Marc,

It is not possible to have a motherboard without the CMOS battery. It is a button cell about 3/4 inch in diameter. Just remove it for a minute and then re-insert it. Your BIOS password will be eliminated.

Posted on Jan 01, 2011

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 2,567 Answers

CMOS battery is also referred to as RTC battery.
Please refer to page 84 of the following Service manual PDF file for this model:
http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c01129740/c01129740.pdf
There is an illustration of how to access this battery & replace it.

Posted on Dec 31, 2010

  • Mohamed Omran Dec 31, 2010

    I do believe you & I did not mean any insult.
    Since you have the motherboard out, it might be helpful if you find its part number & post it here. May be I could find some information about this specific motherboard.
    There is also a possibility that the motherboard has a soldered-in battery. These usually does not look like an ordinary CMOS battery, & they could be identified only by the symbols & numbers written on them.
    I hope I could be of any help to you.

  • Mohamed Omran Dec 31, 2010

    Hi. I got you reply.
    Thank you, & no need to apologize.
    I'm trying to find any information to help you out of this situation, but unfortunately couldn't find anything useful up till now.

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 2,574 Answers

How to Bypass BIOS Passwords

BIOS passwords can add an extra layer of security for desktop and laptop computers. They are used to either prevent a user from changing the BIOS settings or to prevent the PC from booting without a password. Unfortunately, BIOS passwords can also be a liability if a user forgets their password, or changes the password to intentionally lock out the corporate IT department. Sending the unit back to the manufacturer to have the BIOS reset can be expensive and is usually not covered in the warranty. Never fear, all is not lost. There are a few known backdoors and other tricks of the trade that can be used to bypass or reset the BIOS
DISCLAIMER
This article is intended for IT Professionals and systems administrators with experience servicing computer hardware. It is not intended for home users, hackers, or computer thieves attempting to crack the password on a stolen PC. Please do not attempt any of these procedures if you are unfamiliar with computer hardware, and please use this information responsibly. LabMice.net is not responsible for the use or misuse of this material, including loss of data, damage to hardware, or personal injury.

Before attempting to bypass the BIOS password on a computer, please take a minute to contact the hardware manufacturer support staff directly and ask for their recommended methods of bypassing the BIOS security. In the event the manufacturer cannot (or will not) help you, there are a number of methods that can be used to bypass or reset the BIOS password yourself. They include:
Using a manufacturers backdoor password to access the BIOS
Use password cracking software
Reset the CMOS using the jumpers or solder beads.
Removing the CMOS battery for at least 10 minutes
Overloading the keyboard buffer
Using a professional service
Please remember that most BIOS passwords do not protect the hard drive, so if you need to recover the data, simply remove the hard drive and install it in an identical system, or configure it as a slave drive in an existing system. The exception to this are laptops, especially IBM Thinkpads, which silently lock the hard drive if the supervisor password is enabled. If the supervisor password is reset without resetting the and hard drive as well, you will be unable to access the data on the drive.

--------------------------------------------------------------------------------
Backdoor passwords
Many BIOS manufacturers have provided backdoor passwords that can be used to access the BIOS setup in the event you have lost your password. These passwords are case sensitive, so you may wish to try a variety of combinations. Keep in mind that the key associated to "_" in the US keyboard corresponds to "?" in some European keyboards. Laptops typically have better BIOS security than desktop systems, and we are not aware of any backdoor passwords that will work with name brand laptops.
WARNING: Some BIOS configurations will lock you out of the system completely if you type in an incorrect password more than 3 times. Read your manufacturers documentation for the BIOS setting before you begin typing in passwords
Award BIOS backdoor passwords:
ALFAROME ALLy aLLy aLLY ALLY aPAf _award AWARD_SW AWARD?SW AWARD SW AWARD PW AWKWARD awkward BIOSTAR CONCAT CONDO Condo d8on djonet HLT J64 J256 J262 j332 j322 KDD Lkwpeter LKWPETER PINT pint SER SKY_FOX SYXZ syxz shift + syxz TTPTHA ZAAADA ZBAAACA ZJAAADC 01322222
589589 589721 595595 598598
AMI BIOS backdoor passwords:
AMI AAAMMMIII BIOS PASSWORD HEWITT RAND AMI?SW AMI_SW LKWPETER A.M.I. CONDO
PHOENIX BIOS backdoor passwords:
phoenix, PHOENIX, CMOS, BIOS
MISC. COMMON PASSWORDS
ALFAROME BIOSTAR biostar biosstar CMOS cmos LKWPETER lkwpeter setup SETUP Syxz Wodj
OTHER BIOS PASSWORDS BY MANUFACTURER
Manufacturer Password
VOBIS & IBM merlin
Dell Dell
Biostar Biostar
Compaq Compaq
Enox xo11nE
Epox central
Freetech Posterie
IWill iwill
Jetway spooml
Packard Bell bell9
QDI QDI
Siemens SKY_FOX
TMC BIGO
Toshiba Toshiba
TOSHIBA BIOS
Most Toshiba laptops and some desktop systems will bypass the BIOS password if the left shift key is held down during boot
IBM APTIVA BIOS
Press both mouse buttons repeatedly during the boot

--------------------------------------------------------------------------------
Password cracking software
The following software can be used to either crack or reset the BIOS on many chipsets. If your PC is locked with a BIOS administrator password that will not allow access to the floppy drive, these utilities may not work. Also, since these utilities do not come from the manufacturer, use them cautiously and at your own risk.
Cmos password recovery tools 3.1
!BIOS (get the how-to article)
RemPass
KILLCMOS
--------------------------------------------------------------------------------
Using the Motherboard "Clear CMOS" Jumper or Dipswitch settings
Many motherboards feature a set of jumpers or dipswitches that will clear the CMOS and wipe all of the custom settings including BIOS passwords. The locations of these jumpers / dipswitches will vary depending on the motherboard manufacturer and ideally you should always refer to the motherboard or computer manufacturers documentation. If the documentation is unavailable, the jumpers/dipswitches can sometimes be found along the edge of the motherboard, next to the CMOS battery, or near the processor. Some manufacturers may label the jumper / dipswitch CLEAR - CLEAR CMOS - CLR - CLRPWD - PASSWD - PASSWORD - PWD. On laptop computers, the dipswitches are usually found under the keyboard or within a compartment at the bottom of the laptop.
Please remember to unplug your PC and use a grounding strip before reaching into your PC and touching the motherboard. Once you locate and rest the jumper switches, turn the computer on and check if the password has been cleared. If it has, turn the computer off and return the jumpers or dipswitches to its original position.

--------------------------------------------------------------------------------
Removing the CMOS Battery
The CMOS settings on most systems are buffered by a small battery that is attached to the motherboard. (It looks like a small watch battery). If you unplug the PC and remove the battery for 10-15 minutes, the CMOS may reset itself and the password should be blank. (Along with any other machine specific settings, so be sure you are familiar with manually reconfiguring the BIOS settings before you do this.) Some manufacturers backup the power to the CMOS chipset by using a capacitor, so if your first attempt fails, leave the battery out (with the system unplugged) for at least 24 hours. Some batteries are actually soldered onto the motherboard making this task more difficult. Unsoldering the battery incorrectly may damage your motherboard and other components, so please don't attempt this if you are inexperienced. Another option may be to remove the CMOS chip from the motherboard for a period of time.
Note: Removing the battery to reset the CMOS will not work for all PC's, and almost all of the newer laptops store their BIOS passwords in a manner which does not require continuous power, so removing the CMOS battery may not work at all. IBM Thinkpad laptops lock the hard drive as well as the BIOS when the supervisor password is set. If you reset the BIOS password, but cannot reset the hard drive password, you may not be able to access the drive and it will remain locked, even if you place it in a new laptop. IBM Thinkpads have special jumper switches on the motherboard, and these should be used to reset the system.

--------------------------------------------------------------------------------
Overloading the KeyBoard Buffer
On some older computer systems, you can force the CMOS to enter its setup screen on boot by overloading the keyboard buffer. This can be done by booting with the keyboard or mouse unattached to the systems, or on some systems by hitting the ESC key over 100 times in rapid succession.

--------------------------------------------------------------------------------
Jumping the Solder Beads on the CMOS
It is also possible to reset the CMOS by connecting or "jumping" specific solder beads on the chipset. There are too many chipsets to do a breakdown of which points to jump on individual chipsets, and the location of these solder beads can vary by manufacturer, so please check your computer and motherboard documentation for details. This technique is not recommended for the inexperienced and should be only be used as a "last ditch" effort.

--------------------------------------------------------------------------------
Using a professional service
If the manufacturer of the laptop or desktop PC can't or won't reset the BIOS password, you still have the option of using a professional service. Password Crackers, Inc., offers a variety of services for desktop and laptop computers for between $100 and $400. For most of these services, you'll need to provide some type of legitimate proof of ownership. This may be difficult if you've acquired the computer second hand or from an online auction.

Posted on Dec 31, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Power on pasword lost


You would need to disassemble the notebook to access the RTC battery. Remove the battery for around five seconds and reinsert it. reassemble the notebook and power it on without reinstalling the battery pack. This will reset CMOS and clear the BIOS password. If you are uncomfortable doing this yourself, I would strongly suggest finding a technician to do it for you.

Oct 31, 2013 | Compaq EVO N600C (Refurbished) 14.1" LCD...

1 Answer

Bypass power on password


Disconnect the AC power.
Remove the battery.
Remove the CMOS battery.
Wait a few minutes.
Re-insert the CMOS battery.
Reconnect the battery.
Try it.

If all else fails, find your original bill-of-sale, to prove "ownership", and telephone IBM for support.

May 09, 2010 | HP Compaq Evo Notebook N600c

1 Answer

Give me password for compaq evo n600c


You can remove your bios password by reseting your CMOS battery or jamper. You need to open your notebook remove first the battery and all screw at the back of your notebook. You can see there a CMOS battery together with the CMOS jamper. Just read it you can read CLRSCR which means clear cmos, just pull it with in 10 seconds and insert it back. Now you are done to reset bios.

Mar 03, 2010 | HP Compaq Evo Notebook N600c

1 Answer

Ms 6541 bios will not clear it starts whitout jbat jumper


there are three pins on board area where the jumper is fix the jumper on the middle pin and the other unused pin and power the machine to clear cmos. rate this solution

Jan 04, 2010 | Compaq Evo D310M 845G P4 Motherboard

2 Answers

Cant get past my bios password to reinstall windows


Remove the battery and wait several minutes before reinstalling. That will reset the bios to factory.

Sep 25, 2009 | HP Compaq Evo Notebook N600c

1 Answer

Bios password


The master password for Compaq is "compaq"
If that doesn't work you need to use a jumpe on the motherboard:
This Jumper is often named like: "RTC_CLEAR" , "CLEAR CMOS" , "CLRCMOS" , "CLRCMS". His position is often near by the motherboard battery. You will need to reconfigure any BIOS changes that you have done.

Mar 17, 2009 | HP Compaq Presario V3000T Notebook

2 Answers

Power-on password to reset


just remove CMOS battery and it will reset all bios settings to factory defaults

Nov 30, 2008 | Compaq Evo N610C Notebook

3 Answers

Startup password forgotten


Did you remove all other power supplies from the computer, like the battery and AC adaptor. try this again, only leave the CMOS Battery out for 2-3 Minutes, with no other power supplies attached.

Jan 11, 2008 | HP Compaq Evo Notebook N600c

2 Answers

Password problem


Go thro safe mode and delete the password or create a new account ... or if u have given password to bios .. just remove the CMOS battery and put it again after ten to twenty minutes and restart ...

Dec 23, 2007 | HP Compaq nc6320 Notebook

2 Answers

Power-on password bypass


You'll need to get under the keyboard or open some of the available openings on the bottom of the laptop.

What you're looking for is a battery. This is known as the CMOS battery. Once removed, power on the computer.

If it doesn't prompt you for the password, then you have successfully erased the memory.


Hope this helps :)

Nov 25, 2007 | HP Compaq Evo Notebook N600c

Not finding what you are looking for?
HP Compaq Evo Notebook N600c Logo

245 people viewed this question

Ask a Question

Usually answered in minutes!

Top HP Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18391 Answers

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

Tony

Level 3 Expert

2600 Answers

Are you a HP Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...