Asus Rog Strix Z370-E motherboard no POST or QLED lights

[chappers]

Hi,

Strange problem. Motherboard was working prior to removing from PC case. Following removal, it switches on but won't POST and none of the QLEDs light up.

I've removed the BIOS IC 25Q128A and have written the latest BIOS to it.

I've checked the CPU core voltage and it's present at 1V.

Still won't POST or show any QLED lights. The boardview is available from this site, the sub-forum to this one. Haven't got a schematic though.

I'm not very familiar with motherboards. Can anyone advise please?

[The1]

Re: Asus Rog Strix Z370-E motherboard no POST or QLED lights

Check for 3.3v on bios chip. If you don't have that then bios won't be read by ec chip which is what controls the boot leds.

[Takidn]

Having the same problem. A high end motherboard with such a bad quality.
Fans and mobo rgb on. But no q led no post and cpu not even heating up. Tried all components on a friends pc all working beside motherboard. Last time purchasing asus products

[chappers]

Having the same problem. A high end motherboard with such a bad quality.
Fans and mobo rgb on. But no q led no post and cpu not even heating up. Tried all components on a friends pc all working beside motherboard. Last time purchasing asus products

I fixed the motherboard. There was a supply missing but I can’t remember any of the designations right now, I’d need the board view open on my PC. It was due to a couple of side-by-side 0 ohm links having overheated and no longer making good contact with the PCB.

[chappers]

Highlighted in red is one of the two 0 ohm resistors that weren't making good contact with the PCB. Despite this boardview showing 3 resistors, only two are actually present.

This caused the 3V supply from the PSU connector to not make it to the various ICs and other parts. Result was no QLED lights, CPU didn't get warm, etc.