I'm using the Dell optiplex 760.The computer is unable to progress at the loading screen with the blue bar moving across the bottom of the loading bar.After I reboot,options like safe mode,start w

the led's are covered in the manual at dell.com
welcome to dell.
https://www.dell.com/support/home/us/en/04/product-support/product/optiplex-760/manuals


see your manuals, the service manual covers service.
page 162 in fact.

You can download drivers for Dell OptiPlex 760 by using the following link:
http://www.dell.com/support/home/us/en/04/product-support/product/optiplex-760/drivers

GuruAid.com

The dial-up modem would install inside the computer in a PCI slot. VERY easy to install but a couple considerations before doing so... There are different sizes depending on whether the OptiPlex is a mini-tower or small form factor case. Also - you would need drivers for the modem that are compatible with the operating system you have installed on the computer.

Hi.

Because you are unable to format or delete the partition then I'm afraid that this is a strong indication that you need to replace the hard drive, this is probably due to bad sectors and clusters that the drive cannot read or write to.



Regards.

You are going to need to start your computer in safe mode and find the XP drivers that will work for your motherboard manually from the web (Assuming that there are any created for XP for that board). That blue screen you keep getting is because you don't have the correct driver loaded for something on the motherboard that it needs to boot correctly and your XP install couldn't find it on the web to install automatically.

Start your PC and press F8 several times until the boot menu comes up. Then select "Safe Mode with Networking".

Now start looking for your drivers here:
http://www.dell.com/support/drivers/us/en/19/Product/optiplex-780

To get the correct sound drivers for you Dell go to the link below input you service tag number it will automaticly take you to a page with all available downloads for you computer.

http://support.dell.com/support/downloads/index.aspx?c=us&l=en&s=gen

Try the next computer in your school-room's collection of computers.

Report the "dead" computer to the I.T. supervisor, so that it can be repaired.

Got some From DELL web ,Good Luck with it
http://accessories.dell.com/sna/category.aspx?c=ca&l=en&s=bsd&cs=cabsdt1&category_id=6175&~ck=anav

http://support.dell.com/support/edocs/systems/op760/en/sm/mtindex.htm
Got You Tech Guide Book http://www.dell.com/downloads/global/products/optix/en/Opti760_Tech_Guidebook_July_1_2009_Sustaining.pdf

the video card or monitor is history

go to desktop - right click, select "properties", then "settings", with 2 monitors you should see both here. Make sure you have "extend my Windows onto this monitor" checked.

You should be able to drag the icons over to the same monitor as the start button.

When you drag your mouse across the screen it should move across both monitors.

Hope this helps...if it does, please give me a positive!!

thanks!