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Replaced power supply now, and am now getting no signal to my display

I was in the middle of playing Dark Souls 3 on the weekend when suddenly my PC powered down. I assume it was because the fans on my graphics card kicked in and the 500w power supply was struggling. This has happened twice in the last few months and I have been meaning to replace the PSU. I recently replaced my graphics card to a Gigabyte 750 ti, however with the fans it required more power which is where my above problem started occurring.

Generally, it reboots and all is fine, however this time it never came back on and after leaving it for an hour still nothing. I get a flash of blue light around the power button from an LED but that’s it.

I replaced the PSU yesterday with a corsair 550w, however I have a bad feeling the MOBO might have blown. Basically on my old PSU I had a 20 pin connecter (sorry I’m doing this from memory) the main connector slot on the mobo had 4 free pins after it was plugged in if that makes sense, the new PSU however has the full 24 pin connector and then the 6 pin for the CPU/Graphics (not too sure which). I plugged it all in turned it on and got nothing. Not even the flash of blue light. So I took out all components, and tested it again still nothing. Eventually I got it to turn on by removing the 6pin from the Mobo as well as detaching 4 of the 24pin plug, this now boots up the pc, all fans spin, including graphics card fans, but I am getting no signal to my monitors?

I tried an old graphics card but still had the same results. I should mention the mobo is an older ASRock Z77 Pro, with i7 intel chipset (all around 4yrs old). I also can’t seem to see a light come on on the motherboard when its powered, but in saying that I don’t recall ever seeing a light on there. There’s also no beep when I turn the pc on, the hdd starts to spin along with the fans but that’s it. Do all mobo’s beep when turned on, and do they all have lights?

Any advice would be great.

Cheers,
3 answers Last reply Best Answer
More about replaced power supply signal display
  1. Hello... 1) See if your MB CPU/IGT is sending a signal out. B )
    2) remove your Video card... See if your MB CPU/IGT is sending a signal out.
    3) verify your monitor is set for the cable type you are using... (setup screen)
  2. Ironsounds said:
    Hello... 1) See if your MB CPU/IGT is sending a signal out. B )
    2) remove your Video card... See if your MB CPU/IGT is sending a signal out.
    3) verify your monitor is set for the cable type you are using... (setup screen)



    Thanks for the tip. The computer is still using all the same cables it was when it was working so i don't think that's the issue. I will test and see if i get a signal without the video card plugged in and see if that works although i did try a different graphics card already with the same results.
  3. Best answer
    Hello... Well I'm here and your there with the Computer... B ) I have to do "babysteps" with large amounts of different knowledge level people here... and it is Best to start at step One on the opening subject matter... get a feel for your words and your system current state B D
    I can leave this thread alone... to others... if you would like me too? B o

    4) a MB battery removal and CMOS clear/reset, per MB manual/PDF... will set the (defaults) MB CPU/IGT for video output. (remove video card)
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