This problem is occurring on a Optiplex GX150, if that helps.

Org,

Thank you for using the Dell Community Forum.

See if you can get into safe mode by pressing the F8 key while the system is booting up. Once in safe mode remove the driver for the Ethernet card.You can then restart and see if the system will go into Normal Mode.

When I start PC nothing appears on monitor and light on monitor never turns green, pressing F8 doesn't do anything, still nothing appears on monitor.

Org,

See if the monitor is bad by unplugging it from the video card and plug the power directly into a wall outlet. Then turn the monitor on to see if a red,green and blue test patter appears.If not, the monitor may be defective.

I have connected the monitor to another PC and it works fine, if I have monitor unplugged from PC it shows a settings box and the light is green , then when I plug it into Optiplex150 the light turns red and the screen goes black.

I have connected the monitor to another PC and it works fine, if I have monitor unplugged from PC it shows a settings box and the light is green , then when I plug it into Optiplex150 the light turns red and the screen goes black.

  I'm having the same problem, my monitor stays black when ever I plug it into the Pc. The green light does not come on the monitor,, but when I unplug it from the pc it turns green, when I turn on the pc i hear a series of beeps, but nothing in the computer.. ????

Has a solution been found?Help!?

I am having the same issue with my optiplex GL...please advise! the system wont post at all, the power supply comes on and the power light turns green but the monitor light stays brown (never green) and a screen never comes up. yes the monitor is fine on other machines!

arthas76,

Thank you for using the Dell Community Forum.

It very well could be the video card that is not working.If you have a video card that is in a pci or agp slot try and reseat it to see if that will resolve your issue. If you have onboard video you will need to contact support and possibly have the motherboard replaced.