SOURCE: BIOS failure ??? DEll Systems OptiPlex GX270 Series
this may or may not help, try taking out the cmos battery out (looks like a watch battery) and leave for a few minutes then replace, this will reset the bios.
SOURCE: Dell Optiplex GX270 bios will not recognise
u will need to first update your bios and then reinstall dvd cdrw
Update BIOS And Chipset Driver - How To hope this helps
Go to the website of your computer manufacturer and select your computer model (this is usually done in the Support section). You should have the option to download drivers and BIOS for your model. If there is a newer version available download the BIOS and follow the instructions to update the BIOS of your computer - every computer is different so I can't give you exact directions. Updating the BIOS can be risky - follow the directions carefully and do not unplug or turn off your computer. If possible also update the chipset driver
Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer
As the computer is booting repeatadly press the F8 key as the computer is booting
If done properly the user should get to a screen similar to the below screen.
Select the option for Safe mode command prompt only
Windows Advanced Options Menu
Please select an option:
Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt
Enable Boot Logging
Enable VGA mode
Last Known Good Configuration (your most recent settings that worked)
Directory Services Restore Mode (Windows domain controllers only)
Debugging Mode
Start Windows Normally
Reboot
Return to OS Choices Menu
Use the up and down arrow keys to move the highlight to your choice.
select safe mode with command prompt
Then type at the C:\> prompt: type
DEBUG
and hit Enter. You'll see a dash (-) at the DEBUG prompt. Now type:
o 70 2e
which will show as -o 70 2e at the DEBUG prompt. Hit Enter. Then type:
o 71 ff
and hit Enter. Finally type:
Q
and hit Enter one last time to quit DEBUG back to the C:\> prompt.
Now you're ready to reboot your PC, and press the appropriate key or key
combo (look it up in your motherboard manual if you don't know it) to access
your BIOS Setup.
Youll notice the password is gone.
If this fails try typing
At command prompt type debug
you will get a - prompt where you can type the following (<enter> means press enter, not type enter*)
A <ENTER>
MOV AX,0 <ENTER>
MOV AX,CX <ENTER>
OUT 70,AL <ENTER>
MOV AX,0 <ENTER>
OUT 71,AL <ENTER>
INC CX <ENTER>
CMP CX,100 <ENTER>
JB 103 <ENTER>
INT 20 <ENTER>
<ENTER> just hit enter on this line
G <ENTER>
Q <ENTER>
Basic BIOS password - works 9.9 times out of ten
If this fails you will need to
Select safe mode with networking to download
you could download all of these or just one save them to a usb drive for later use if one fails to remove the password
http://www.tech-faq.com/reset-bios-password.html
At some stage you might need to press Ctrl+Enter rather than just Enter if on a Dell Latitude E5410
http://majorgeeks.com/CmosPwd_d239.html
A CMOS BIOS password recovery tool
Editors note: This tool should only be used by experienced computer users.
Please see the enclosed read me if you would like to run it from Windows.
Failure to follow instructions (from Windows) will cause your anti-virus to flag this as a virus.
Hope this helps.
some manufacturers use there own name as the bios password
try phoenix is this fails
restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer
Reboot the computer As the computer is booting repeatadly press the F8 key as the computer is booting
If done properly the user should get to a screen similar to the below screen.
Select the option for Safe mode command prompt only
Windows Advanced Options Menu
Please select an option:
Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt
Enable Boot Logging
Enable VGA mode
Last Known Good Configuration (your most recent settings that worked)
Directory Services Restore Mode (Windows domain controllers only)
Debugging Mode
Start Windows Normally
Reboot
Return to OS Choices Menu
Use the up and down arrow keys to move the highlight to your choice.
select safe mode with command prompt
Then type at the C:\> prompt: type
DEBUG
and hit Enter. You'll see a dash (-) at the DEBUG prompt. Now type:
o 70 2e
which will show as -o 70 2e at the DEBUG prompt. Hit Enter. Then type:
o 71 ff
and hit Enter. Finally type:
Q
and hit Enter one last time to quit DEBUG back to the C:\> prompt.
Now you're ready to reboot your PC, and press the appropriate key or key
combo (look it up in your motherboard manual if you don't know it) to access
your BIOS Setup.
Youll notice the password is gone.
if this fails try typing
At command prompt type debug
you will get a - prompt where you can type the following (<enter> means press enter, not type enter*)
A <ENTER>
MOV AX,0 <ENTER>
MOV AX,CX <ENTER>
OUT 70,AL <ENTER>
MOV AX,0 <ENTER>
OUT 71,AL <ENTER>
INC CX <ENTER>
CMP CX,100 <ENTER>
JB 103 <ENTER>
INT 20 <ENTER>
<ENTER> just hit enter on this line
G <ENTER>
Q <ENTER>
Basic BIOS password crack - works 9.9 times out of tenhope this helps
Select the "Administrator" user. Click Change my password. Enter a new password in the corresponding text boxes. Click OK. Write this password down and store it in a secure place Close the User Accounts window and restart Windows.
if still no luck
click start type cmd press enter
At command prompt type debug
you will get a - prompt where you can type the following (<enter> means press enter, not type enter*)
A <ENTER>
MOV AX,0 <ENTER>
MOV AX,CX <ENTER>
OUT 70,AL <ENTER>
MOV AX,0 <ENTER>
OUT 71,AL <ENTER>
INC CX <ENTER>
CMP CX,100 <ENTER>
JB 103 <ENTER>
INT 20 <ENTER>
<ENTER> just hit enter on this line
G <ENTER>
Q <ENTER>
Basic BIOS password crack - works 9.9 times out of ten
hope it helps
Select the "Administrator" user. Click Change my password. Enter a new password in the corresponding text boxes. Click OK. Write this password down and store it in a secure place Close the User Accounts window and restart Windows.
if still no luck
click start type cmd press enter
At command prompt type debug
you will get a - prompt where you can type the following (<enter> means press enter, not type enter*)
A <ENTER>
MOV AX,0 <ENTER>
MOV AX,CX <ENTER>
OUT 70,AL <ENTER>
MOV AX,0 <ENTER>
OUT 71,AL <ENTER>
INC CX <ENTER>
CMP CX,100 <ENTER>
JB 103 <ENTER>
INT 20 <ENTER>
<ENTER> just hit enter on this line
G <ENTER>
Q <ENTER>
Basic BIOS password crack - works 9.9 times out of ten
hope it helps
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