I have an Inspiron 530 (the intel series) desktop here that has a unique problem. Pressing the power button to start the computer does not allow it to power on. I have to unplug and replug in the power cable for the system to physically power on. However once the system is running if I press the power button, it will shut down as any normal system does.
To help diagnose this, the HDD and DVD drive are disconnected from SATA and power. I have removed all sticks of DDR2 memory and replaced it with known working DDR2 memory. All PCI cards have been removed and I'm using the onboard graphics. The only thing that is original and left connected is the motherboard and CPU. I have also swapped out multiple power supplies to diagnose this with.
The situation is the same however, when there is no power to the system, pressing the power button does not cause it to boot. I have to unplug and replug in the power cable in the back which brings it to powered life. The blue light by the power switch is on as well as the blue hard drive indicator light also works. Then once the system is powered up and in the BIOS/Windows Boot process, I can press the power button to shut it down or press and hold 5 seconds to do a normal hard shut down. Just the powering up is misbehaving.
Does anyone have any thoughts as to what might be wrong? Is the motherboard having a problem?
Bad motherboard battery?
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Forum Member since 2004
I am NOT a Dell employee
Thanks for the suggestion, I removed the CMOS battery and swapped it with another one and that did not solve the problem.