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Today I changed my power strip with one with more slots, so naturally I turned everything off, plugged the cords to the new power strip and tried to boot my system.

Alas, the motherboard is giving me an error with 2 beeps followed by 4 beeps and there is no video output to the monitor. The system is not booting at all, but all fans seem to work fine.

I've encountered this in the past and the issue was magically fixed on its own after a reboot or two, but now the problem persists.

I have tried re-seating CPU, GPU and RAM, I also removed the CMOS battery, drained the leftover power and put it back in but without any luck.

What is happening here and how do I fix it?

Specs:

  • Motherboard: Gigabyte Aorus Gaming 5 x470 (BIOS v. F50)
  • CPU: AMD Ryzen 1700x
  • RAM: Hyper-X Predator 3GHz 16GB
  • GPU: Sapphire RX 580 8GB Nitro+
  • PSU: Corsair RM 750 80+ Gold
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  • Was there some sort of power surge? From OFF, try starting in BIOS. Nominally F1 but check your own documentation
    – John
    Dec 29, 2019 at 19:14
  • @John no power surge because I've got a power strip that prevents that. I just switched it off. The keyboard is not receiving any power in order to try and mash "delete" to enter BIOS. there is no video output at all, not even the BIOS screen.
    – Valamorde
    Dec 29, 2019 at 19:18
  • That wold indicate the power supply has gone defective.
    – John
    Dec 29, 2019 at 19:19
  • Have you tried using the older power strip (back to normal), and removing all other items around besides the PC & Monitor (?).
    – vssher
    Dec 29, 2019 at 19:29
  • Since you have gone through all you have, try and re-seat the 8-pin ATX 12V power connector and 24 line ATX power to the motherboard.
    – vssher
    Dec 29, 2019 at 19:40

1 Answer 1

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Seems more like letting you know what happened than an actual answer but after some days of technical "examination" and troubleshooting it turned out that my Motherboard's North Bridge chip was the culprit.

Got a new Motherboard and all seems fine now.

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