How do I supply energy from the back pads? Which one is for what? Where i can find that diagram? https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/rpi_SCH_4b_4p0_reduced.pdf I may be wrong but TP1, TP2, TP3 for VCC (Power) ; TP7, TP8 TP9 and TP12 Ground Pads. Am i right?

How do I supply energy from the back pads? Which one is for what? Where i can find that diagram?

try the composite video out. And make sure it's turned on in config.txt

TP7 and TP12 are connected to the same thing - ground. See the trace connections between the two test points and the ground fill? To power a Pi 4 from an external 5V source, use the GPIO pin header 5v/GND pins. https://pinout.xyz so can i power up Raspberry pi from gpio 5v and ground pins am i right?

Can i power up raspberry pi 4 b from this TP7/TP12 pins? and which is is ground, which is it VCC?

Can anyone tell me what is this port back of the Raspberry Pi 4 B

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