No Video on Screen HP Pavilion m7667c

[abuhamad]

My son was using the computer and suddenly the screen went black, I don’t know if he did something wrong or it was normal problem, anyway, the first idea came to my mind was the video card might went dead although it is less than 2 years old, so I have another video card and I replaced it with the current one, but the screen was same, then I thought maybe my son played with the Bios setting, so I reset it by the jumpers trick, and when I turned on the computer I had video, at the beginning the resolution was not correct, but after Windows did some recovery, it was fine, so I returned the video card and I used the computer for the day, the following day and while my son was playing with the computer the screen went black again, so the first idea came to my mind is it is the Bios setting again, but this time even with reset it, it didn’t work, I tried to do it several time, but didn’t work, so I thought maybe first time it wasn’t resetting the Bios fix it, it was some else that I might move or touched, or ever it was an intermittent problem and this time it is permanent, so what would be the possibilities that creating such problem like the screen is black and no video and I mean from the time of turning the computer, not even when the computer checking screen, is it possible that the Power Supply is not providing enough Watt to make the video card working?

My computer is m7667c http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&dlc=en&cc=us&docname=c00794035 the only difference is the video card is replaced to Galaxy Geforce 8400 GS.

HP Pavilion m7667c

Windows 7 32-bit

Any help would be appreciated.

Thanks,

[TheOldMan]

While it could possibly be the power supply, it could be something else, too.  The next thing to check is the monitor.  If it is disconnected from the computer, does it show a warning?  Assuming the computer does make sounds similar to the normal sounds during startup, is anything visible during startup?

[abuhamad]

The monitor is working fine and currently I am using it with an old computer to keep my son busy playing old games.

[wb2001]

abuhamad,

What happens when you remove the video card, and use the onboard VGA port?

[abuhamad]

Unfortunately the motherboard doesn`t have onboard VGA port, it is Asus P5BW-LA  http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&docname=c00748726&dlc=en

BTW, there is a symptoms that wasn`t there before the problem, one I turn the computer on by pressing the power button, the computer start running for 5 seconds then it stops for 2 seconds before it resumes again by itself, now there is no screen but I can see the power button lights goes on and off, and I even see the fans inside the computer stops for 2 seconds before they resume spinning, which looks like they have power then the power disconnect and reconnected, and that is why I thought about the power supply, I will soon bring another power supply to test it.