Thanks Yes, the power source has been swapped several times to no effect.
Swapping doesn't solve your issue better try other solutions like flashing your miner with the latest firmware.
Also, try to replug all connections from your miner PSU cable ribbon cable then clean the terminal with petrol or thinner.
Don't forget to check the PSU connectors male and female socket and maybe the control board PSU terminal has full of dirt and burns parts.