Dell sx280 buzzes with no video

SOURCE: Getting my dell motherboards to start up.......

you might have fried the mobo when transferring it, and try it with a monitor see if anything comes up on the screen at startup

SOURCE: How do you remove the Motherboard from the Dell

simple it slides out it has a green lever in front off the motherboard and you pull it up on some tipes of dell it's a screw to remove that first then pull up de green ting and slide the board and board shasy out, on the board is a screw that you remove to free the motherboard from the motherboard shasy bye

SOURCE: Buzzing noise on boot up, about four buzzes.

The first thing to check would be the CMOS to see if there is a setting for "case intrusion" or something to that effect. Some computers have sensor that goes off the computer's side panel is opened. I believe this can be disabled in the CMOS and/or it's just a wire connected to the motherboard that can be disconnected.

It could also be an important fan, like the CPU fan, isn't spinning fast enough which may or may not lead to an over-heated CPU.

Also check to be sure all the memory sticks are firmly seated.

If it doesn't look like any of those it could always the the power supply. See if you can borrow one for a little while for testing purposes just to see if it works.

If none of those pan out I would say call Dell support and see what they say.

SOURCE: my dell dimention 9200 makes a buzzing noise and no show on monit

Sounds like its just 1 of the fans inside the case needs replacing or possibly the fan inside the power supply. These dont cost much and are easy to replace.

SOURCE: My dell plex gx620 will turn on make some weird

I have the same problem. I think it might be that the computer is not powering on all the way do to overheating. Try replaceing the CPU fan.