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Re: dell 8400 dead
Can you tell if your hard drive is running? You can here it or feel it spinning.
Are the fans running?
If no, I'm 99% sure you need to replace your power supply and/or motherboard.
This kind of thing usually happens after a power surge.
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Generally when you plug a network cable into a network port a yellow/orange light should come on to notify the user that a physical link/network has been made, there should also be a green light close to it that flashes when network traffic is flowing.
I've been having a similar issue with my ASUS M2N68-AM and have found that it was DOA (Dead on Arrival). Try removing all of the components of the machine aside from the processor, heat sink, and power connections to your motherboard. If your machine does not boot up with this configuration either your processor or motherboard have gone bad. Check to see if you have a green light on the board, if you see a yellow light either steady or solid you have an issue with either the power supply or motherboard, consult your motherboard setup guide for color definitions of errors.
if you have another motherboard test the cpu there.
if you don't, then just do this with the ram, take all the ram out, and power on, it should beep or complain, let it for a moment, turn off unplug or switch off at the wall, install one of the memory modules back in and turn on.
How about the video card or is it build in to the board?
also does the powersupply have a green led on its back, is that FLASHING when you try to turn on? if so, the powersupply is probably bad, it should be steady green.
Ordinarily yellow light indicates ACPI standby. On some Dell and HP motherboards the same light also indicates a CPU failure, usually due to overvoltage or overheating.
Turn the PC completely off (unplug from the wall socket). Open the side, so you can see the motherboard with CPU and heat block. Best if you wait some ten-twenty minutes. Plug the power cable and power on the PC. Does it turn on, and does the CPU fan rotate correctly? If the PC turns on, and the fan doesn't, you have a busted fan which needs replacing.
If this doesn't solve the issue, describe exactly how the error happened. Is it a new PC, a PC which already worked and stopped doing so, a DIY assembled machine? Does it never turn on, or does it sometime do?
It is a problem with the video card if one was recently installed the card may not be in all the way or a conflict between the average video card built in to the motherboard and a high quality one installed on the motherboard
The error message indicates you posted (power button green, video on the screen... keyboard failure error message). But your comments indicate the power button is yellow/orange. That indicates a "no post".
If the power button is yellow, disconnect everything from the motherboard, but the connections for the power supply and control panel (power button). Turn it back on.
If you get a green power button, and the system beeping at you add the memory back in. All four slots MUST be filled!!! If it's still green, add the video card back in. If that works, keep adding things one at a time until it either works, or you know what's causing the problem.
If you get a yellow button, check your heatsink. You just replaced the motherboard. You might not have gotten it right the first time. If everything is tight, and all the power connections are tight and plugged in (if I remember right, there should be a 20 pin and a 4 pin connector), it might actually be a bad board. Try swapping the old board back in and see if you get a different response (if so, the new board is bad).
The light indicator for the battery is; green-charging, yellow-battery failure, and red-charging system failure. The charging system failure happens when the power management chip fails. The pm chip regulates and controls the power input & usage, allows the machine to switch from AC to battery, and cotrols the charging. This will also cause the problem with the power button not workin or being hard to start. Unfortunately, the motherboard will have to be replaced in order to fix this.
Sure hate saying this but your dell 4400 board is the trouble.
Just finished reading a bunch of post. Double check Dell's web site too. No lights lit on the back of the PC means no power & the green led you see on the board is telling you that the board has power.
Seems your not the only person with the same problem as with other 4400 owners.
One user called dell & stated the problem he had, (just like your problem), to the letter. Dell admitted there is a problem with the 4400's. mainboard. Dell does not go out & replace every board. They, like every company wait till someone has this type of problem & contacts the Mfg. Your 4400 was made back in what 2003 - 2004. If Dell still supplies your board the best they'll do is sell you a refurbished board.
I think your better off buying a new board & fitting into your Dell case. You can try to find a board that will run your current componets.
This is dell's web site link for the dell 4400.