I have a clients dead NVR (G4) .....it just died, client noticed loud fan noise before it kicked the bucket. My guess was the PSU just died. I bought a small form factor PSU that fits perfect in the case, pretty much a direct replacement for the old one. The plug is an ATX factor on the motherboard and the new one plugs in just fine...problem is it's not turning on. After closer inspection the wires going into the plug don't match the old one...so my guess is the trigger from the button isn't sending the signal. I confirmed the new PSU works by jumping the green wire with a black wire, but can't do this with the plug plugged into the mobo!

Does anyone know if these PSU for NVRs are special? I highly doubt they would reinvent the wheel. The old PSU is FSP Group fsp150-10gsv ...I cannot find this PSU anywhere online which means it's a lovely China special.

FYI G4 is not warranting this, let alone even interested in supporting this since their move to Uniview. When I called the rep said they no longer have any documentation of any of their older line since the move to Uniview. I may be stuck eating this because G4 is nothing but shady, effers with their very shady bs business ethics. Buyer beware with these con artists.

Specifically, what doesn't match about the wires?

Are you certain the old supply used ATX switching and wasn't hard switched from the rear? It's slightly odd that the supply is specifically referenced on the net as a Dahua DVR power supply, as if its a custom model only for that purpose, and not just a generic off-the-shelf part.

It's also possible the old power supply took something out on the motherboard when it quit.

you probably need to find the two wires and add a resistor to keep the PS ON.
I will get back to you with the details when my son gets home.

Bringing this back up. so the PSU boots fine when not plugged into the MoBo contacting the green with a black wire. But as soon as its plugged into the mobo and i connect the green nothing happens.

Wondering what I can do to even see if this thing is fried or not?