I have HP/Compaq d530 pc. Since 6 moths its working fine.. some time I shutdown after 5-6 days. But today I shut down my pc for some reason. After 1 minute again start the pc but unable to start. I opened the case and notice that green light on the mother board is blinking. I remove the power cable and then inserted again but no success. When I put the power cable again the light on the mother board again start to blink soon. For the CMOS I pressed the button on the button but still the same thing.