No beeping, no video displayed.

I had this issue once, turned out to be a grounding issue. Remove the motherboard, place it on a piece of cardboard, connect all needed parts (power, hard, memory, video, cd drive. Now try to power it up. If it comes up go to a home improvement store and buy some rubber or paper washers to place between the motherboard and case, were the mounting screws go.

Hope this helps

Disconnect the drive and try to boot to the BIOS (usually with F1, F2 or Delete key). If that doesn't work, try removing all cards from the computer (except a video card if the video port is not on the motherboard). If you can boot this way, try inserting back any removed cards to see what hangs it. Do you hear any beeps when the computer is booting (beep codes)?

Hi,

Indicates a video error has occurred and the BIOS cannot initialize the video screen to display any additional information.Video (Mono/CGA Display Circuitry) issue.Try to disconnect/connect the video card. If nothing happens, there's a possiblity that the problem is with the LCD cables or the LCD itself.

Hope this will help...Your response is very much appreciated...

First thing I would do is try using the monitor on another working computer to see if it works. If so, you have eliminated that as an issue.

Kind of hard to fathom that you got two fubar mo bo's but as they stay in the street, sh-- happens. However, The lack of a beep means that the bios is not posting. When you turn on a computer, the bios does a check of internal components and environment - if all is ok, it beeps and then has the hard drive install the operating system into the computer's memory. And if something is wrong, the bios will usually give out certain beeps that are coded such as when you have bad memory, no memory, etc. But you are getting zippo, and no video at all on your monitor - this is one of the few times you wish you had the blue screen of ***** because with that at least you know your hardware is ok but your software has an issue.
The conditions you have reported would seem to indicate that the bios chips on both units are corrupted and not working. U might also make sure that the memory chips are good. A bad chip, not a missing chip, will sometimes prevent the mo bo from booting up.

If you also remove all the memory and turn on the witch, if the bios is working it will beep like crazy. If nada, bios is dead.

If boards are new as you indicate I would return for exchange.

Hi. Were you able to see the the DELL post screen when you turn on the computer? Take out the battery and unplugged the power adapter from your computer and to the wall socket. Press and hold the power button for 30 secs. Put everything back in then turn on the computer.

The bios is configured to boot to CD? Monitor turns on, and you can see the Bios? HardDrive has an OS installed? There may also be a ram / motherboard issue. I would also test the video card. But I would start by Unplugging the power cord, and reseting the Bios. If you know which jumper, use it, if not just remove and after about thirty seconds re-install the onboard QUATER battery. After this boot to Bios, check all the Boot - Drive parameters and try to boot up. If that fails continue with the Ram Check, the Motherboard, and the HardDrive, and the Video Card. Hope this helps.

Usually, by a process of elimination.

First, inspect the motherboard -- all those round towers are capacitors; any that are leaking (brown stuff) are bad news; any towers bulging at the top, instead of flat, are bad news.

If you turn the computer on, and the fans start to spin, and the disk-drive makes a bit of noise for a short time, then the power-supply probably is NOT the problem.

If you turn it on, and you get multiple "beeps", then it's either the RAM or the video-card.

If you turn it on, and nothing happens, it's the CPU or the RAM or the power-supply.

Disconnect the disk-drive, the CD-drive, the floppy-drive, and all USB devices. If you then turn it on, and you don't get a single "beep",
it's the motherboard or RAM or power-supply.

Test the RAM in another computer.

Temporarily connect a different power-supply to your computer;
if it starts properly, it's your power-supply.

remove the external display card boot ur machine with on board then disable the on board display and then install your external display card and then connect it to the monitor

Have you recently experienced a power surge or had an electrical (thunder) storm in your area? Potentially your motherboard and/or processor could be toast since the fan running and CD Rom drive opening will continue to function because they receive power separately from the motherboard via the power supply. If you have access to a different compatible processor, you could try to install it in the motherboard to rule out a motherboard failure, otherwise you're looking for a new motherboard.