Question about Dell Dimension 8100 PC Desktop

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Dell 8100 Dimension will not find the Hard Drive or CD Rom

Upon Power on, the Dell 8100 Dimension will not detect either the Hard Drive or the CD Roms. I tried a known good drive.

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  • herb921 Jun 29, 2009

    I have tried all of the above, new Cables, different known good hard drive. the yellow StandBY light is lite on the mother board, and lite D on the rear of the case is yellow, the rest are green.



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If the drives share the same IDE cable, try to replace the cable and make certain it is seated properly on the motherboard. Check for bent pins on either drive and on the motherboard IDE connector. Sometimes pins (especially near either end of the 2 rows of 20 pins) will bend under if they are not lined up with the IDE cable. Also check that nothing changed on the Jumper positions on the drives. They should be set to Master if both drives are single and Master (hard drive) and Slave (CDROM) if they share the same cable.

Posted on Jun 29, 2009

  • B.J. Zolp
    B.J. Zolp Jun 29, 2009

    If you have access to a different computer, you can try the drives in that or try them with an IDE to USB adapter. Also, if you can get a hold of a PCI IDE controller card, you could attach the drives to that device instead of the motherboard.


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Check to make sure the hard drive jumpers is set to master and the CD/DVD rom is set to slave, have a look at this for an idea >>>>
Dell 8100 Dimension will not find the Hard Drive o - 74fbf15.jpeg
As soon as you have the jumpers in the right place your system should recognize both drives.


Posted on Jun 29, 2009

  • Lee Hodgson
    Lee Hodgson Jun 29, 2009

    Does the machine turn on?


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Did you open the system and change the cable connections?? This happens due to wrong/disturbed cable connections, reconnect it to the proper working slot, if you do not know the right place try all the slots one by one and find the correct position, make sure you connect the power cables too.
Check if the memory chip (Ram) is inserted properly into the slots, Also in the BIOS setup always keep the device detection to "Auto Detect" unless you are pretty sure about the configuration.

Posted on Jun 29, 2009

  • marc orlando Mar 24, 2011

    I have 2 dell dimension 8100s I reassembled from spare parts I collected or scavenged from dead towers. The two towers are essentially the same, APG video,generic audio and nic cards. I also bought 5 WD-800 hdds to replace the dead hdds in those very same towers. The issue is as others have said that for #1 the hard drive IS detected, DOES appear in both bios and boot screens. For #2 though the drive is NOT detected. I cannot find any solution anywhere. Help please. reeltoreelguy@gmail,com The hdd comes set to CS. I left it that way. I am loading the OS as I write this.


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