No video after the standby or sleep mode

Hi guys. I have a mystery I hope you answer decent to. sounds like a common problem but mine has a few twists of questions on what I read.
Whenever my monitor is turned off or goes into mode standby, the computer stops sending the video signal. The monitor not coming back unless I unplug the monitor on the back of the computer for a few minutes or I restart my computer. Sometimes a solution works while the other is not and it is not consistent.
The monitor has been tested on another computer and it works well. I bought a graphics card, but no difference. I even tried my plasma HDTV (which became an option due to the new graphics card), but which does the same thing.

The computer is a HP Pavilion a6219h running Vista 32 bit home premium with Service Pack 2.
The problem was with the video output built into the motherboard.
The monitor is a ViewSonic VX2235WM-5 model VS11349.
Message is "No Signal" on the screen.
I've disabled all functions of sleep, put everything forever and saved. Problem persists.

I bought and installed a nvidia GEFORCE GT 630 graphics card. PCI PCIe passes in the BIOS. Still the same problem.
With this new graphics card, I connected the computer to my plasma hdtv via hdmi plug. The same problem. No matter what I do, the screen works until it is either turned off or standby mode.

It keeps it done.
At this point, I think it must be the motherboard. I also read online that it could be the power supply? What do you think? Is there anything else I can try?

Hello

did you check you RAM?

Try chking your ram, ram sometimes creates this issue.

all your Rams have the same frequency? If you have more then 1 RAM in your system!

to test your ram use this

Probe RAM V1.70
http://www.ramprobe.com/?p=download

I hope this helps!

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Tags: HP Desktops

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