Need gx 280 ethernet controller offline computer. disc ?

THAT QUESTION YOU SHOULD ASK A GAMER'S FORUM.

There is no S280 in the Optipex model line, just GX 280 and SX 280.
The problem you are describing is common to the GX 280 model.
Here is a link to the manual:
ftp://ftp.dell.com/Manuals/all-products/esuprt_desktop/esuprt_optiplex_desktop/optiplex-gx280_user%27s%20guide_en-us.pdf
Select "Small Form-Factor Computer" and then select "About Your Computer". Scroll down to "System Board Components".
To the right of the processor is a smaller heat-sink attached to the motherboard via a wire similar to the size of a paper clip bent open. That wire is soldered to the motherboard which may have loosened it's connection and the circuit is open. This heat-sink on the chipset of the motherboard. The wire needs to be re-soldered to the motherboard.

you can download it from the Link below...Choose Network for your Network adapter/Ethernet card.

http://support.dell.com/support/downloads/driverslist.aspx?c=us&l=en&s=gen&os=WW1&osl=en&catid=&impid&SystemID=PLX_GX280

This page has almost all drivers for your PC GX 280 and i am sure this will be very useful for you.

visit this site for solutions;www.tomshardware.com › ... › General Motherboard

Hiiiii please check your hard disc data cable. and also check *********** board support the hard disk. 

set the heat sink paste

the power connector is located near the SATA 2 port

gx 280 sound driver

Here is a link that will download the exact driver package for your computer's LAN adapter:

http://support.dell.com/support/topics/global.aspx/support/downloads/en/downloads_splash?c=us&l=en&s=gen&~mode=popup&file=175637

If you need additional drivers, you can find them on the below page:

http://support.dell.com/support/downloads/driverslist.aspx?c=us&l=en&s=gen&ServiceTag=&SystemID=PLX_GX280&os=WW1&osl=en&catid=&impid

Here is the code,Please make sure the memory you used is DDR2 and please rate this a fixya