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Raspberry Pi 3B+ with Noobs installation Then Emulation Station

There is an official Rasberry pi touch screen attached by the ribon cable and 4 jumper wires to the Gpio. I used different power and ground lines than the documentation stated because the power and ground right next to each other are running my cooling fan. I cannot get the touch screen to work either (not sure if related). It displays just fine, but no touch response. If by some chance this is related and there is a solution for that too--great. If not I do not need the touch.

I have updated and upgraded software. I read another thread that indicated the Noobs install is to blame sdtv=0 has been un-commented in my config.txt Hdmi_ignore_hotplug=1 has been added to my config.txt hdmi_force_hotplug=1 has been commented out.

Power Supply is 2.5amp, but I am gettting intermittent under voltage warnings. 3.0 amp power supply arrives tomorrow. Could this be causing the issue?

Cable (3.5 to RCA) has been tested on a known good Rasberry Pi 3 B, and I get picture out from that unit just fine and in craptastic composite style--but that old feel is half the fun. (It does not have the touch screen attached to it when I test for composite out)

I get a black screen from the composite with some walking down of lighter areas? Basically black but just a little bit of lighter shading in the blackness that is just enough for me to no believe its my imagination.

Anything else I should try? I have actually purchased another 3B+ that I will change out with my current one tomorrow. I actually built this pi into something so that is a pain, but at this point I can't imagine anything but hardware failure.... except user error. What am I missing?

UPDATE

Power supply does not make a difference (fixed under voltage issue but nothing else); as removing yellow and green GPIO cables did not; as replacing Pi Board with a new one did not. I'm at a loss here. Next step is to do a fresh install--will keep updated.

FINAL UPDATE

I had the DVI cable attached and thus... No SDTV. Cannot run the two at once according to the reasberrypi.org.

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  • Is your TV with composite input PAL or NTSC?
    – CoderMike
    Commented Jan 7, 2019 at 10:46
  • With a RPiB+, RPiA+, RPi2B RPi3B, RPi3B+, RPi3A+, RPiZ or RPiZW you ONLY need the power and ground wires for the official RPF touch screen. The green & yellow wires are only needed on an RPi1B or RPi1A
    – Dougie
    Commented Jan 7, 2019 at 11:25
  • Codermike; it is a NTSC I believe--i'm in the us and the Raspberry Pi 3 B that does work has "sdtv=0" in its config. But I confess this is my first dealings with PAL/NTSC. I'm in the US, and the TV is for the US market. If I got that wrong please feel free to let me know. Commented Jan 7, 2019 at 18:50
  • Dougie, thank you so much. Going to remove those two wires and see if it helps either of my two problems! Commented Jan 7, 2019 at 18:51
  • As a side note, new power supply cured under voltage, but nothing else. Commented Jan 7, 2019 at 18:52

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