I believe that my Vaio is failing POST but I want to make sure. When I apply power, the HDD, Caps Lock and Num Lock LED's flash (very quickly -- < 500ms). I hear the HDD start up but the screen never shows anything. I have tried to boot from an external HDD and the only difference is that I can hear the HDD shut off after about 5 seconds. I do NOT hear any audio (beeps) from the PC. I have also tried an external monitor but no indications on it either.
Yesterday, I had the same problem although the Vaio did eventually boot; Today nothing. I have reset the computer. I have reset the RAM. I velieve that since I am hearing no POST audio indication, that POST has failed. Does anyone know if there should be an audio indicator of POST completion? Any other ideas?
Thank you Jen. I had already read that article. Let me add some info.
After many attempts to boot the pc, it finaly started. I figured something was wrong with the HDD. Niether chkdsk and sfc found any errors. I did have some System Events related to the HDD drivers. I couldn't find anything definitive on the errors so I just took a leap and reloaded the OS. It is now on Windows 7.
I rebooted the pc over 15 times over a 24 hour period with no issues. I was leaving for the day yessterday afternoon so i turned the pc off. It sat for about 8 hours and when I got back home last night, i tried to start it. Nothing. Black screen. All LED's flash (HDD, Power, Caps, Num) very briefly -- Same symptoms.
I am perplexed. While is sounds and feels like a POST Failure, I'm not sure what else I can do. I did reformat the HDD when I reloaded Windows. I don't believe that this is hardware as if hardware fails, it's done. I'm convinced that this is software related.