Motherboard vs. CPU Troubleshooting - Dell Dimension 3000
Posted on 2006-05-09
Have a Dell Dimension 3000 (1 year old) that died during the process of a Palm Sync (so the owner says). Machine simply did a hard shutdown and would not power up. After all the basic troubleshooting with reseating cables, RAM, removing peripherals, etc., I replaced the power supply with brand new one. The mobo power led illuminates. Still no luck. Here is what else I have done to try and troubleshoot (with new power supply in place). System has integrated video and no additonal PCI cards.
- Removed both RAM modules. No power up.
- Removed CPU. Pins Okay. Reseated. No power up.
- Replaced CMOS battery with new one. No power up.
- Removed all IDE cables and power from IDE devices. No power up.
Now the strange thing that I don't understand. I removed the CMOS battery again to clear the CMOS. I plugged in the power supply with the battery out and power plugged in to the HD. The power comes ON and the HD spins, but I don't get a POST beep or anything else. If CMOS battery is in, I get nothing. Machine was moderately dusty when the case was opened. Not the worst I have seen.
Anyone have any ideas on what this could be or why the power comes on when the battery is out?