No Signal after installing new graphics card

Hello and thank you in advance for your help!

We have a 2 years old HP p6540y.  It has an ATI video card integrated. When we recently turned on, we got a message "no signal" on the monitor and then he'd go to sleep.  We tried many things to fix... listed below, in order and are always the same message.  Please advise!

(1) No Signal: DVI, VGA, HDMI.  So we unplugged and rebooted, no change.

(2) checked monitor and DVI & VGA cables with another computer: they all work.

(3) installed new graphics card: NVIDIA GEForce GT 610.  Still got same message "no signal".

(4) we plugged/unplugged all the other cards/cords / no matter what we could and cleaned.  Then, finally, the monitor turned on! But not for long...

(5) after you restart the computer after installation of the graphics card driver, we got the 'no signal' message again.  We released once more, other cards/sheets and again once the monitor and the computer came to life.

(6) we uninstalled the ATI integrated graphics card.  When we go to display, Advanced Options, he mentions our new NVIDIA as graphic/video card.

(7) we turned computer off during the night and this morning when we have lit, we once agin got the message "no signal".  We have unplugged/plugged computer several times.  Also tried the trick with cards/plugs by pulling and we have nothing.  No Signal.  After doing this several times (about 10), he is finally working again.

(8) we changed the sleep settings to: screen saver = never; Standby mode = never.

(9) we restarted again to get once more no signal message.

So... what should we do?

Thank you very much!

Triusa, welcome to the forum.

I think that your problem is caused by the power supply unit (PSU).  Here's a guide to help you solve the problem:

Also, the existing PSU is 250W.  The 610 GT requires a minimum of 300W.

If your problem is solved, please click "accept as a Solution.

Tags: HP Desktops

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