You can check voltages at internal power connector when connected external PSU and vice versa - check voltage at external power connector when when connected internal PSU and make conclusion.
all modern rb have this automatic switching functionality in built on external dc barrel connector and poe input. now I want to know is the same thing we can apply on internal power port and external barrel connector?? i think circuit of PoE input and circuit of power supply at motherboard are not ...
why cant we use internal power port and external barrel connector simultaneously. i just want the explanation. it depends of schematic of your internal and external PSUs. If you apply external power source to output of internal PSU (or internal power source to output of external PSU), it can damage...
Do you have a watchdog set? Shure, with automatic supout. Router reboots then progress is 15% - after 30 seconds. Another routers with the same watchdog settings make supout successfully. I try to turn off watch dog. The router hangs. Even LCD indicator was not functionedю I waited for 30 minutes a...
I think, it depend of schematic of your laptop's PSU.
Better to make power switch, wich will manually (automatic) disconnect 19v wire of "laptop" PSU from motherboard, while connected external "factory" PSU.