How do i remove the processor on a dell optiplex gx 280 from the heatsink and repaste the processor seems to be like glued to the heatsink?

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.

no ... dell optiplex GX280 is a socket LGA478B.. go to www.dell.com... ty

Hi, Thanks for using fixya.

I have the same computer with the same problem. I changed the power supply that cured it for me, I hope it does the same for you.

Terry

Hi, take the small round battery out of the mother board for about 5 minutes
and put it back in, and that removes the password,

Did you install it to the factroy default installation or did you install windows anew? 

You need to install the Dell sound drivers. They're found on the dell home page or on your media that came with the Optiplex. 

Also, check the system control / administtration / hardware section to see if windows potted a problem with the hardware. 

the problem description is
Ithr
Smm mode is initializing the thermal probes.

problably the system is running at high temperature because of improper fan speed, so try to clear the nvram if its not working flash the bios if still the issue persists, replace the heatsink assembly and the motherbord.

gx 280 sound driver

download driver ''R145551.exe'' and install it for audio device to work. you can download this by typing the r145551.exe on google search for more details contact me [email protected]

check your motherboard manual for the compatibility of processors