When I start my gx280 the computer directly go in safe mode only yellow light on and take speed in loud noise.

the 7b is a hard drive controller issue the controller on one computer is not the same as the other. maybe try the ultimate boot cd to clear the problem

OK, I use GX280s as home servers and ran into a similar problem with one of them...

The problem may be serious and not worth fixing (motherboard).

Turn power on
Fan(s) come on full power, sounds like a jet engine, or eventually gets that loud.

See if you power light has gone amber.

You get nothing on the screen, no Dell splash screen/post, nothing.

This is what I posted a while back concerning the above. Obviously I cannot bee 100% certain as I do not have your box in front of me. This a known issue.

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See if the power light goes amber after power up. I had (have - still siting in my basement) one that did same. Power up, fans go full blast . Power light goes and stays amber. This is USUALLY caused by bad capacitors on the mother board. Known GX280 problem going back. If you look on the motherboard, the capacitors should have flat tops and not leaking. If the are rounded or leaking, the MB has probably gone bad. Bottom line this is usually a defective motherboard. Mine was a bad caps issue, you issue could be different, but it does sound like the motherboard.

You can google "gx280 solid amber light loud fan" and see the issues. Here is one link.

http://community.spiceworks.com/topic/111476-gx280-solid-amber-light-and-loud-fan

I just replaced one of my old 280s with a dual core Dell Precision 390 workstation for about $118, and that included shipping, off of ebay.

There probably is another fan, located inside the power-supply, that is making all the noise.

Borrow a stethoscope from a nurse or doctor, and listen to the noise, to pinpoint "where" on the computer that is the origin of the noise.

Hi, sounds like a crash, do you get any report messages after reboot? Try starting in safe mode; press Del button during initial bootup, once in safe mode you can reset to a time before the problem started. Hope this helps, if not come back to me?

cable connection issue between computer and the display? Adjusted the cable? Tried another monitor? Safe mode works? If safe mode works, you can try to update the driver of the graphic card.

This looks like a software or hardware conflict. Try running 'chkdsk' from WinXP setup cd (or Vista's), (after booting, choose option to repair).

If disk check does not help, then you will have to back-up your data manually, format the harddrive, and re-install OS.

system halted my pc help

VIRUS

start windows in safe mode by shutting down the computer...then start the computer up and quickly tap on the F8 key...select safe mode....this will get you past the login where you can go into the control panel and go to "Users" and then change the password for your user ID

Go here and download this program.

http://www.download.com/SpeedFan/3000-2094_4-10067444.html

This program will control your fan speed based on your cpu temp. It's main use is to quiet fan noise.