Dead MBO/PSU?

[b1gf00t]

Before we start Specs are:

• Gigabyte B150M i7-6700, 
• Zalman ZM600-GV PSU,
• EVGA GTX960,
• couple of SATA spinning Hard Drives,
• Samsung 860 Evo M.2.

I've also read/tried this post, and this one.

 

This system is a prebuilt from PBTech and is ~4yrs old. Over the past month it's randomly restarted twice, once under load (gaming), and once under light loads (firefox meme's). While did a self-hard-reset, the fans remained on, so it wasn't like a power cut. 

Recently moved house and unpacked the battlestation, after updating Nvidia Drivers the next day, she won't boot/POST beep.

I do get fan spin on the PSU, CPU cooler and case fans.

 

List of things I've tried

- everything plugged in but using onboard graphics
- Only using 1 or 2 RAM sticks in various slots, with nothing else plugged in
- reseating 24pin and PSU power cable
- starting computer with nothing (a part from m.2) and 1 RAM stick,
- unplugging all power cables, shorting green to black on the 24 pin, for this the PSU fan spins
- removing BIOS battery for 5 mins
- shorting CMOS connector
- having no RAM still has no POST beep
- capacitors on mobo look fine

 

All these result in CPU and system fan spins, No POST beep and the only way for the computer to shut down is press power button for 4 seconds (apart from shorting the 24pin, so CPU is good.

 

Dead mobo or PSU?

[KhakiHat]

Do you have another system that you could test the PSU in?

[b1gf00t]

My friend may have one.

I did how ever take my rig into the local computer shop and they had a test PSU they let me use on my rig. I managed to get a POST beep with all components connected. Didn't check video output though.

Disconnected their PSU and tried mine with their power cable, got a POST beep, didn't check video though. Ruled it down to percussive maintenance and possibly a failing PSU.

Just got home and tried my Jug Cord cable, no POST beep.