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Dell Dimension 1100 Power-up Issue

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5 replies

by lester

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Dell Dimension 1100 just out of warrantee:

On pressing power button briefly, the fan will start but only for a second and then stops. The green LED on motherboard remains on constantly and the orange/amber led near the power switch flashes regularly but the green LED adjacent to it is off.

When the power to the HDD & DVD drives is disconnected and the above repeated, the fan stays on and the green LED on the motherboard also remains on and the orange/amber LED & the green light near the power button remain on constant. On reconnecting power to either drive the fan stops and the system reverts to state mentioned above.

Can anyone advise where the fault lies?

5 replies

by oh smeg

To be a Power Supply problem as the Power Supply is going bad and not producing enough power to keep the system running.

The give away here is the fact that the fans will run for a short time and then switch off. What should happen with a correctly working PS is that when you turn it on the system starts and the PS waits for a signal from the M'Board and continues running if it doesn't receive the signal it shuts down and just leaves the 5 V DC that is constantly available to the M'Board so that next time that you want to switch on you have the current to produce the ripple that starts the Power Supply.

While it could be a M'Board problem it's far more likely to be a Power Supply problem so I would suggest replacing the PS with a Brand Name Unit and not another Dell Spare Part as Dell spares are marginal at best.

Col

by lester

If not buying from Dell how can I ensure that I get the correct power supply? Can you suggest a supplier or two?

by oh smeg

Which is Antec but as they are the best that I can buy here and I've seen one stop a 33KV spike during a thunder Storm when a tree brought down overhead power lines and brought the 33 KV into contact with the Low Voltage Mains Supply I was sold on the Antec's ever since. Though I personally wouldn't suggest that you test these PS's that way.

Anyway I like the Antec True Power units as I've only ever seen 2 fail and in both cases they sacrificed themselves to protect the insides of the cases. So they are the only ones that I can truly recommend because I know how well that they work.

http://tinyurl.com/39r2hw

The above Web Page has the specifications for these units and also has a link to resellers world wide.

Col

by bigdoc922

Do You Ever Get This Fixed I Have A Computer Doing The Same Thing?

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