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Dell 8100 -Alert! System fan not detected

Discussion in 'Hardware' started by Dylansmiles, Feb 16, 2007.

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  1. Dylansmiles

    Dylansmiles Thread Starter

    Joined:
    Feb 16, 2007
    Messages:
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    I recently had to replace a noisy case fan on my Dell 8100. However, I didn't want to buy another Dell fan for the system, I wanted to get a better one. So, I was able to replace the case fan, which is basically the fan for the CPU. However, the replacement fan's power source is connected to one of the power supply connections, instead of the on-board power supply that the Dell fan was previously connected to. Now, when i restart the computer, at the start-up, I get "Alert! System fan not detected", Press F1 to continue, or F2 to System.

    Since Dell has a "custom" connection for the on-board power supply for the fan, I'm unable to use it unless I break down and buy another crappy Dell fan.

    I want to remove this prompt so I don't have to press F1. I look around in BIOS and didn't really see anything. Maybe this is something that is hardwired into the chip?

    Is all hope lost? Please Help~
     
  2. telegramsam

    telegramsam

    Joined:
    Jul 7, 2006
    Messages:
    1,085
    You're going to need a fan that connects to the motherboard header. Here are about 200 of 'em. http://www.newegg.com/Product/Produ...0110573+1373226565&Submit=ENE&Subcategory=573

    I assume you have the dell setup with the giant green shroud between the heatsink and the back of the case....

    Notice that they have a 3 pin AND 4 pin connector. That will tell your BIOS that you have a fan.

    That warning is wired into the motherboard so that you don't torch your CPU if it comes unplugged. Without that other connector, the system thinks you don't have a fan.
     
  3. Rich-M

    Rich-M

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    22,443
  4. Dylansmiles

    Dylansmiles Thread Starter

    Joined:
    Feb 16, 2007
    Messages:
    2
    Thank you for your responses, however, Dell has a "custom" connector which does not match a the generic 3 prong connector.

    To resolve the issue i did the following:

    1) Demolished the old fan, but retaining the connector and wires.

    2) I removed the generic 3-prong connector from the new fan, and soldered
    the wires together, then wrapping them in electrical tape.


    I turned on the computer and it worked fine!


    Once again thanks for your guy's help!
     
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