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I accidentally shorted my PSU on a damaged SATA power connector. I picked up a replacement Thermaltake 700 PSU and dropped it in.

Now the PC won't POST. I unplugged everything except the VGA/HDMI (Tried both) and it powers on (with the CPU fan spinning), but nothing appears on screen.

Then I remembered the 4-pin ATX connector was unplugged so I connected that, but it won't even power on (no CPU fan spinning) with that connected. Without the connected 4-pin ATX power, it would at least power on (CPU fan spins). Any ideas?

Here's my parts:

ASUS PRIM H310

Thermaltake 700

Intel coffee lake CPU

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    Maybe you damaged the motherboard as well as the PSU.
    – Michael Harvey
    Commented Sep 23, 2019 at 18:45
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    To electronics shorting VCC to Ground is one of those issues that can do all sorts of damage. Just because the CPU fan was spinning, does not mean the CPU is functional, nearly everything is directly connected to the CPU in some capacity. I suspect the short did massive damage.
    – Ramhound
    Commented Sep 23, 2019 at 18:54
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    Frying a motherboard with a short anywhere in the system can happen. The only thing left is to reset the CMOS/Firmware settings: Unplug the power cord, see page 1-1 of your motherboard manual dlcdnets.asus.com/pub/ASUS/mb/LGA1151/PRIME_H310-PLUS/… to remove the coin battery. Let it sit for 5 minutes by the clock, put the coin battery back in, plug in and retry getting into POST and BIOS/Firmware to reset to factory default settings.
    – K7AAY
    Commented Sep 23, 2019 at 18:58

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Reset to default

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