Hello

Setails
Home Eclectic - 120v
Both devices are in the garage on different circuits. i have made sure.
Using low power mode on both devices. i have made sure
Using 14g cables for power cables
using serge protect 500jouls with 14g cable

I purchased a used t15 and s11.

I ran the s11 first 24 hours. no issues with other devices running at once dryer, AC washer. no space heaters in the house.

I then power on the  t15 and let it run together. everything is running fine for over 24 hours. in that time dryer, stove, AC all been on/off in the house

I am getting 38thz on slush pool.

Issue:
I wake up today and T15 is offline. the device does not power on. no fan spinning. nothing.

Troubleshooting
tried different power cable.
tried different wall outlet in the home away from garage.

I have verified the outlet is working with other devices iphone charger, volcano vap, laptop charger. outlet is working.
Breaker is not tripped
No power serge or have had them at my house. living hear for a while.

S11 is still running to this moment no issues

Research done
I fine maybe the power supply has entered power protection mode and need to be set to bitmain.

or is the power supply just died from it being an old unit?

please advice would be great.