I think you are right your Dell display is a factor here. Your Dell display is designed to be a power source for your system as well as being a display. But you appear to have been trying to also charge your system using the Apple charger in addition to the Dell display so you have two chargers connected!
The USB-C standard has a weakness which you appear to have fallen into! It currently doesn’t over dual power supply support.
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I had two systems come into me which exhibited this issue. In there case they where using two chargers as the system, was being used to render videos. The owners thought they could run the systems with two chargers as the system would run out of power between the battery and the one charger with some long videos! Sadly, they damaged their systems TB/USB-C ports. I suspect you’ve don the same here.
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I had two systems come into me which exhibited this issue. In there case they where using two chargers as the system, was being used to render videos. The owners thought they could run the systems with two chargers as the system would run out of power between the battery and the one charger with some long videos! Sadly, they damaged their systems TB/USB-C ports. I suspect you’ve done the same here.
The onboard diagnostics have limitations it won’t test the power services as it has no means to do that. You’ll need a USB-C power meter to test your ports ability to receive power as well as deliver it.
Here’s one unit that will do the job [https://usa.banggood.com/Type-C-USB-Tester-DC-Digital-Voltmeter-USB-C-Voltage-Current-Meter-Ammeter-Detector-p-1356021.html?|USB-C Tester DC Digital Amp & Volt meter]
But you still have to deal with your damaged logic board. If you still have AppleCare coverage or have gotten AppleCare + service support contract you should be able to get Apple to fix your system, If not there are people who can replace the damaged power control chip or just not use that set of ports.
I think you are right your Dell display is a factor here. Your Dell display is designed to be a power source for your system as well as being a display. But you appear to have been trying to also charge your system using the Apple charger in addition to the Dell display so you have two chargers connected!
The USB-C standard has a weakness which you appear to have fallen into! It currently doesn’t over dual power supply support.
I had two systems come into me which exhibited this issue. In there case they where using two chargers as the system, was being used to render videos. The owners thought they could run the systems with two chargers as the system would run out of power between the battery and the one charger with some long videos! Sadly, they damaged their systems TB/USB-C ports. I suspect you’ve don the same here.
The onboard diagnostics have limitations it won’t test the power services as it has no means to do that. You’ll need a USB-C power meter to test your ports ability to receive power as well as deliver it.
Here’s one unit that will do the job [https://usa.banggood.com/Type-C-USB-Tester-DC-Digital-Voltmeter-USB-C-Voltage-Current-Meter-Ammeter-Detector-p-1356021.html?|USB-C Tester DC Digital Amp & Volt meter]
But you still have to deal with your damaged logic board. If you still have AppleCare coverage or have gotten AppleCare + service support contract you should be able to get Apple to fix your system, If not there are people who can replace the damaged power control chip or just not use that set of ports.