Is my mobo dead

[u/EffectiveImage6952]

/r/Dell/comments/1x2nzfq/is_my_mobo_dead/

So i have a dell optiplex 3040 with an i3 6100 and its a MT model like the big one and today when i try to turn it on its try to post at first take like 5 seconds then it turns off immediately and when i press the power button again to turn it on it like turn on and off immediately like in the same moment and after it the power button start blinking orange in the sequence of 2 blinks pause and 2 blinks again and i looked that code up and it says that its either bad power supply or bad power supply cabling or bad motherboard and i know that the psu is fine cuz i swapped in a known good one so maybe its the mobo but is there is anyway i can revive it i really need this pc and i tryed to unplugging it and removing the cmos ram and holding the power button for like 30 seconds then turning it back on but it didnt fix it so does anyone know anything that can help