RE SETTING CMOS

Hi,

If you short the CMOS jumper on the motherboard , you can reset the setup password . Find the CMOS jumper near to the CMOS battery . If you can't find the jumper , just remove the CMOS battery and smps power cord . Wait 3 min and re insert the battery . Now check it will not ask setup password .

Thanks

Probably your BIOS battery, replace that and setup you BIOS again and it should be fine. BIOS batteries look like little round watch batteries.

Any more questions just let me know.

Thanks
John

Try clearing the CMOS --- the down side is your lose all your setting --- the up side is you should be
able to access your BIOS

Clear CMOS Jumper: CLR_CMOS1 ( Located near CMOS battery )
The motherboard uses CMOS RAM to store the basic hardware information (such as BIOS data,
date, time information, hardware password...etc.). Clear CMOS data is the fast way to go back to
factory default when the BIOS settings were mistakenly modified.
The steps to clear CMOS data are :
1. Turn off the computer, unplug the power cord from the power outlet.
2. Remove jumper cap from pins 2-3, put it onto pins 1-2 to short them.
This will clear CMOS data.
3. Return the setting to its original with pins 2-3 closed.
4. Plug in the power cord to your computer and turn it on.
5. Go to BIOS Setup to configure new system as described in next chapter.
Clear Jumper on pins 1 & 2
1 ----
2 ----
3
Normal
(Default)
1
2 ----
3 ----
CLR_CMOS1

• Disconnect the power cable before adjusting the jumper settings.

• Do not clear the CMOS while the system is turned on.

WARNING!
Jumper Diagram Definition Description
1-2 Set Pin 1 and Pin 2 closed
2-3 Set Pin 2 and Pin 3 closed

Remove the small battery for the bios settings. It's a round type like this:

Leave the motherboard some minutes without battery. Replace the battery after a while, start up and get into the bios, load set up defaults, save and reboot, get into the bios and make any settings you wish (date, time e.t.c.)

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Look at the CMOS reset jumper, located near the battery:

For normal operation there should be a cap shorting pins 1 and 2.
Set the jumper correctly, make sure it really shorts these two pins (once I've seen a jumper cap that didn't have the metal connector inside, only plastic), replace the battery and it should keep the CMOS settings.

The best way for the Sony is to remove the cmos battery for at least 30 minutes. Remove the main laptop battery and leave it out. Make sure the power adapter is not attached. The cmos battery can be reached after removing the keyboard and is attached to the motherboard vis a small cable. If you have a "jumper" that come equipped on hard drives to jump the pins on the back, you can "short" the pin connections on the cmos battery socket, power the laptop up using the ac adapter and letting the computer go through the bootup process. When this happens power the laptop back down, take the jumper off and replace the cmos battery. Power back on with just the ac adapter and boot the computer. If the laptop still askes for a bios password just hit enter and it should allow you to log in. Once in go into the bios and reset the date and time. Once that is done power down and replace the main battery. Reboot the laptop and let Windows load.

Below is the steps for clearing the password. Below that is the link for the manual, the picture of the jumper tabs is on pg. 153, good luck

Steps for Clearing BIOS Password Check

If users set BIOS Password (Supervisor Password and/or User Password) for a security reason, BIOS will ask
the password during systems POST or when systems enter to BIOS Setup menu. However, once it is
necessary to bypass the password check, users need to short the HW Gap to clear the password by the
following steps:
• Power Off a system, and remove HDD, AC and Battery from the machine.
• Open the back cover of the machine, and find out the HW Gap on M/B as picture.
• Use an electric conductivity tool to short the two points of the HW Gap.
• Plug in AC, keep the short condition on the HW Gap, and press Power Button to power on the
system till BIOS POST finish. Then remove the tool from the HW Gap.
• Restart system. Press F2 key to enter BIOS Setup menu.
• If there is no Password request, BIOS Password is cleared. Otherwise, please follow the steps and
try again.
NOTE: The steps are only for clearing BIOS Password (Supervisor Password and User Password).

http://tim.id.au/laptops/acer/aspire%204730z%204730zg%204330.pdf

First you need to remove the laptop battery at the back side. Find some screw there and remove it locate the CMOS battery and jamper.

The BIOS password is stored in CMOS memory that is maintained while the PC is powered off by a small battery, which is attached to the motherboard. If you remove this battery, all CMOS information (including the BIOS password) will be lost. You will need to re-enter the correct CMOS setup information to use the machine. The machines owner or user will most likely be alarmed when it is discovered that the BIOS password has been deleted.

On some motherboards, the battery is soldered to the motherboard, making it difficult to remove. If this is the case, you have another alternative. Somewhere on the motherboard you should find a jumper that will clear the BIOS password. If you have the motherboard documentation, you will know where that jumper is.

If not, the jumper may be labeled on the motherboard. If you are not fortunate enough for either of these to be the case, you may be able to guess which jumper is the correct jumper. This jumper is usually standing alone near the battery. If you cannot locate this jumper, you might short both of the points where the battery connects to the motherboard.

Not only the chip inside the motherboard can do it. All you have to do to DISABLE Jumper Setting near by Lithium CR2032 Battery or else in the motherboard by removing in a second (10 secs.) Then put back again and the BIOS were back into default setting.
Good luck!

Removing the CMOS battery for 10 mins will not do it as the chip has a "bubble memory" this will continue to hold all settings for at least 12 hrs so 24 hrs with no power of any kind is recommended to clear it.