I have a five year old Dell XPS-710, Service Tag 47ZNPC1, running Windows 7 Home Premium. The system has exhibited no unusual issues until I tried to turn it on yesterday. When I pressed the power button, I could hear the relay click, but the unit did not start, and the power light flashed yellow on and off. The fans did not start. I did not hear any POST codes and no other lights came on. I then pressed and held the power button again, and after several seconds, the relay clicked and the power light shut off.
The unit is plugged into a power strip that responds to the current draw when the computer is turned on. Ordinarily, when I turn on the computer, the power strip turns on and stays on, but when I tried turning on the computer yesterday, the strip turned on for a moment then shut down.
Today, when I tried turning on the computer, the same thing happened, but when I tried it again a few minutes later, it started successfully.
The computer has been operating normally until now. About a month ago, I added two additional memory sticks, upgrading the memory from 2GB to 4GB. The upgrade was uneventful. The computer is scanned regularly for viruses, and, consistently, none are reported. I have not yet opened the unit to test it or check for loose cabling.
* 750 Watt power supply;
* Intel Core 2 Duo Processor E6300 (1.86GHz);
* NVIDIA GeForce 7900GS 256MB;
* Sound Blaster X-Fi XtremeMusic sound card;
* 16X DVD+R/RW CD-RW drive;
* 4 hard drives – Two ST332062 (320 GB each) SATA, and two WDC WD10 (1TB each) SATA;
* 2 fans, 120mm x 38mm.
Any idea what might be happening?