RESET SMC
SAVED ME A 2 HR TRIP AS WELL----thank you thank you--be patient with my story.
my MBP 2016 had a blank screen when i came home from shopping wouldn't turn on, got the "plug in " icon after i held down the power button. it was plugged into power the whole time. battery dead.
none of my usb c ports would charge
battery dead.....i was panicking
called apple support they made me an appointment apple store 2 hrs away (closest one) to replace my battery
THEN 30 minutes later- my wife told me her MBP (same as mine) wasn't charging her iPhone, as i looked her port was dead as well BUT the other 3 were working.
Hmmmmmmm-----what's going on.
maybe glitch in any recent update
searched and found this support article.
tried it on my wife's---BINGO worked perfect now. all ports charging and all ports charging her iPhone
then i turned to my MBP blank screen----even though blank i did the key combo you suggested.
pressed power button and hallelujah screen came on, battery started charging. all ports working and charging.
VERY IMPRESSED