Monitor stays black after boot, likely faulty graphic card but want confirmation.

My homebuilt PC: Asus P8Z68-V , Geforce GTX-570 , Intel I7 2600K, Windows 7 on a Vortex 3, WD20ears for data. Built in september of 2011 if I recall correctly.

Yesterday I shutdown the pc, it did some Windows updates for some minutes and then went off.

Today I want to boot it, but the monitor stays black. No beeps from the machine, but it makes normal noise and some lights flicker so it has power.

I replace the monitor with another one, that one also stays black after boot.

I connect the original monitor to another pc, there it works fine, so I connect it back to the faulty pc.

I reset CMOS, no difference

2 red leds on motherboard stay on after booting (I only noticed it then) : VGA_LED and BOOT_DEVICE_LED

I replace the Geforce GTX-570 with an old backup graphic card. After booting the monitor is still black, but VGA_LED stays off now. (it only lits up very shortly after boot, I assume this is normal). BOOT_DEVICE_LED is still red now.

I remove CMOS battery for a few minutes and put it back in. I start the pc still with the backup graphic card. Now the monitor is showing boot up process and it mentions the cmos reset. I use bios menu to select my vortex and the pc goes to windows as it should, there is no problem anymore. BOOT_DEVICE_LED is also off now, no warning leds are on at this point.

I replace the old graphic card with the Geforce GTX-570 again, boot up. Monitor black, VGA_LED and BOOT_DEVICE_LED on again.

I put the old graphic card back in, and now it boots without problems and Windows comes up.

So may I conclude my graphic card is defective and everything else is ok ? Replacing my video card with a new one should solve all problems ? I don't have the means to reliably test this graphic card in another pc though, so some confirmation of my suspicions would be nice. If there are other parts that I also should replace just to be sure, then I would like to hear about it.
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More about monitor stays black boot faulty graphic card confirmation
  1. Best answer
    Looks like you troubleshot it correctly. Time to replace the card.

    One more thing, ensure the PSU can support the new card.
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