Forgot BIOS password.

There are several software apps that may help you change the password without tearing the comp apart.
try CmosPwd    at this link: http://www.cgsecurity.org/wiki/CmosPwd
  or IBios located at this site>  http://www.11a.nu/software/bios-pc-bios-security-and-maintanance-toolkit/  download the DOS version .
Good luck and please rate this answer.

The Cmos battery on Compaq NX series is at the back side of the motherboard, so that you have to disassemble the laptop completely to lift the motherboard and remove the battery.

Youy find disassembly instructions below:


HP Pavilion ze4900 Notebook PC, HP Compaq nx9040, nx9030, nx9020 Notebook PC, Compaq Presario 2200 Notebook PC - Maintenance and Service Guide

you have to remove the RTC battery, wich is located under the systemboard! So it is not an easy task to do...you colud have a look here: http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentTyp
e=SupportManual&lang=en&cc=us&docIndexId=179111&taskId=101&prodTypeId=3
21957&prodSeriesId=424677

the rtc battery is on the motherboard.i doubt its the problem. If you have a voltmeter check your charger to make sure it is working. then make sure battery is charged with the voltmeter. try and run the system without the battery in, just using the ac adapter. if it works with the ac adapter and not the battery your battery probably needs to replaced as its been charged and discharged too many times. you might want to just reload the os. the link i gave gives disassembly to all toshiba laptops. the rtc battery on the motherboard looks like a watch battery. it should be good for 5 years or more. your laptop battery will go long before the rtc battery. 
well, if the clock is still losing time, i would go ahead and replace the rtc battery as it is cheap, if you can do the repair yourself. typically when the clock loses time it is the rtc battery, but might be the clock chip, both are cheap and cheap to replace. 
I would not replace the motherboard, not that , that is that difficult, but new lap tops are so cheap these days. i would go through the laptop manual, it should have where the rtc is located on the motherboard. the manuals are typically on line at toshiba. if you cant find the location, i would contact toshiba or post that question on their board. alternatively you could take it into a best buy or circuit city and they might charge you $50 to $80 to look at the computer, then you can determine if you want to have it repaired as they will diagnose the problem. if it is the rtc clock battery they can tell quickly from a voltmeter and the mother board schematic and manual. so you might get your lap topped fixed for under 100.00. toshiba should have a list of authorized repairers so you can call and find who can give you the best deal. the rtc will be near the processor and the batter will look like a round, flat watch battery. so you can pull it out, and in general just find the same voltage and size and replace the battery. i dont have anymore time to help you. 

good luck

HI,

Unfortunately it is not easy to replace the RTC (CMOS) battery in a Toshiba Tecra 9100 laptop. In order to replace the battery you will have to take it apart and remove the top cover assembly. The RTC battery is connected to the power board. It’s really hard to see the battery on this photo, but it’s there. You can find a new RTC battery for this model if you search on the Internet by the following part number:

There is no such easy way to reset the BIOS password for laptops. if u want to reset it follow the below link.....

http://www.tech-faq.com/reset-bios-password.shtml

Thanks for using FixYa.

Http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c00374392/c00374392.pdf


this should help

Robert

The Battery is located on the motherboard..

Hi! Try remove its baterry and replace.