No signal error after replacing MSI MAG A850 GL Gold PSU

[cankrmze152802d4]

Thank you in advance for your support.

I’ve just switched to this PSU and carefully followed the instructions, completing all the cabling thoroughly and without any mistakes.

However, there’s still no display on the monitor. The fans are spinning, and all other components seem to be working. I have already removed and reinserted the CMOS battery, swapped the RAM slots, and checked every pin connection one by one. I also tried using an HDMI cable to get a display, but unfortunately, that didn’t help either.
At startup, the fans spin rapidly for a moment and then slow down to a steady, low speed. Sadly, I’m still getting a “No Signal” message on the screen. Could I have made a mistake somewhere during installation? Or could the 12V CPU power output of the new PSU be faulty?

Gpu : Rtx 3080 ti
Cpu : Intel 13700f
Mobo : asus h610m dd4

 

[plutomate]

what happen to the old PSU? Any chance the board or card is dead already?

 

[cankrmze152802d4]

also tried my old power supply, but still got no display.

I’m pretty sure at this point that my BIOS chip is locked.

I removed the CMOS battery and did a light short circuit.
Tested with only one RAM stick, CPU + 24-pin power, and HDMI cable connected.
The fans started spinning again at the same speed as before, but there’s still no image.

So I’d say there’s a 90% chance the BIOS chip is the problem.

I’ll have it checked and fixed by a technician tomorrow.
I’ll leave an update here once it’s done.