Question Bricked MOBO but it's not BIOS, any tips?

[LinTunes77]

Hoping somebody might have some testing tips/advice before I recycle the board and CPU.

I have an old Jetway NF9G-QM77 mini ITX mobo. I was using it when it suddenly died. Randomly shut off and wouldn't power up. Pressing power button wouldn't start the fans. Replaced the PSU and it would power up again, fans spinning, power on the USB jacks, but no signal to integrated video outs, and I also tried a video card in the PCI slot. I figured it wasn't getting thru POST. BIOS chip is socketed so it was quick enough for me to reflash it with a CH341A, but board still won't POST.

I tried using each of the ram chips individually in slot 1. So they're either both good or both dead.

Since the PSU died, I'm guessing it took something else out on the board when it failed. What would be the most likely thing to have been toasted by a power supply failure? It's old and I'm not sweating it too much, but I had no issues with the performance of the computer as I'm running linux and just using it for audio stuff, it was plenty powerful so I wouldn't mind rescuing it if possible. If updating to newer board I'd need new CPU and RAM too.

The service manual isn't easily available and I have just a basic multi-meter. I don't see exploded caps.
I need to get a PC speaker or rig up an old earbud to the headers or something since I can't hear any codes, if any. There's no multi segment LED display on it.

Jetway NF9G-QM77
G2 i7 CPU salvaged from my 2012 Asus ROG laptop.
Apevia SFX-AP500W PSU
Super Talent DDR3-1600 8gb x2 (salvaged as well)

Cheapie old parts but the system was stable for about 9 years. I'm not too bummed to upgrade, but the mystery puzzle of why it's not working is still haunting me.

 

[Lutfij]

Welcome to the forums, newcomer!

Apevia SFX-AP500W PSU
How old is this unit?

BIOS chip is socketed so it was quick enough for me to reflash it with a CH341A, but board still won't POST.
Did you try dropping in another processor, ram to see if the processor got fried when your PSU went out? If that didn't revive the board, you might want to start inspecting the board inch by inch till you see anything pop out physical. You should also use a multimeter to probe for anything that might've fused. Yes it's a tedious process.

Cheapie old parts but the system was stable for about 9 years.
Things can happen where all yo need is static electivity to nuke a perfectly good system.

 

[DSzymborski]

Yeah, since this was a junk PSU, there was a much higher chance of it taking out something with it. Whether it's the CPU or the motherboard (or both) is most likely to be revealed from testing with known working parts.