Question about Compaq tc4200 Tablet PC

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Reset the bios on a compaq tc4200

I have a compaq tc400 i need to reset the bios, i opened up the laptop but i cant seem to find the cmos battery to reset this, can you help me please i live in the caribbean and i really need my laptop unlocked.

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I haven't tried it yet, but according to HP's "Maintenance and Service Guide" (Available in PDF from their Support website) you have to completely break down the computer, remove the mainboard and the CMOS battery should be located on its underside. Remove it for five minutes, replace and reassemble EXCEPT FOR BATTERY and turn it on under AC power only. I just purchased one that needs reset, but haven't received it yet, so I cannot attest to its effectiveness except that this is deirect from HP. Hope it helps!

Posted on Mar 03, 2009

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I agree with this method but make sure you have no magnetic tools or any other devices near by. Plus leave the battery completely out for 10 min before restarting. Number or document ever screw, because some are used as ground screws to help with functionality of the laptop. I hope this helps, and this method does work from HP pdf and
Good luck...

Posted on Apr 02, 2010

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1 Answer

HOW TO CLEAR CMOS?


Most times you remove the CMOS battery your manual can be found on compaq website Manuals for HP Compaq tc4200 Tablet PC

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To reset the BIOS password read the information from this link.

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I need reset bios password Notebook HP Compaq 2710p


I know some methods to reset bios password.
1. The best and easiest method: Close OS and shut down the electricity power of computer. Open your computer box, take out the cmos battery from the mainboard. Then the bios password will be reset to blank. Put it back after a few minutes.
2. Follow some hard tutorials, it is difficult to do. It is better that you are a expert. For example this tutorial: reset BIOS Password?

So I would suggest you the 1st method. Hope it helps.

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The TC4200 does boot from a USB device, if you connect the USB device to the system it should detect it right away. You may have to change the boot order/

When you booting and you see the Compaq boot screen press F10 to enter the BIOS
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Apr 15, 2010 | Compaq tc4200 Tablet PC

2 Answers

Want to reinstall OS on compaq tc4200. don't have passwords..


If the BIOS password is set, you'll need to return the device to HP/Compaq to get that reset. Only other option I can think of would be to whip the hard disk out and see if it'll boot from a CD at that point. If that is the case, you could theoretically put the drive in another PC, wipe it completely and then reinstall it. The machine will try to boot from HDD, fail and then boot from CD next.

Mar 09, 2010 | Compaq tc4200 Tablet PC

1 Answer

Reset bios


There's no need to reset your BIOS, only you do is to set in your BIOS Setup to boot priority like for example First Boot Priority is your CD/DVD Rom Drive, if you got some Bootable System Disc then the Second Boot Priority is your Hard Disk Drive. Good luck!

Jul 26, 2009 | Compaq tc4200 Tablet PC

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How to remove cmos battey to rest bios in hp 2710p laptop


Go on your manufacturer's website, find the maintenance manual, find where is located the battery and just remove it for a few seconds it may remove the password on your bios. Good Luck!

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1 Answer

I NEED TO RESET THE BIOS ON A COMPAQ TC4200


Try holding the power button for 30seconds. This might reset the BIOS settings. If this doesnt work the your gonna have to remove the CMOS battery inside the laptop. You will have to go through the HP service manual and figure out where it is.

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