GPIO ports not working

Question

Friends,

I try to switch 4 GPIO pins (GPIO.BCM) from '0' to '1', and only the first 2 out of 4 (GPIO18 and GPIO23)do switch, from 0 to 1. I have used different GPIO pins for GPIO24 and GPIO25, without luck. Same result.

I use Python 3.5.3 and GPIO 0.6.5, under Thonny on my Pi 3B V1.2.

Anyone any idea what can be wrong ?

My code (I really simplified to do fault finding):

import time as time
import RPi.GPIO as GPIO

GPIO.setmode(GPIO.BCM)
GPIO.setup(18, GPIO.OUT)
GPIO.setup(23, GPIO.OUT)
GPIO.setup(24, GPIO.OUT)
GPIO.setup(25, GPIO.OUT)

GPIO.output(18,1)
GPIO.output(23,1)
GPIO.output(24,1)
GPIO.output(25,1)

print("Pin %s status is: " % (str(18)) + str(GPIO.input(18))) #shows '1'
print("Pin %s status is: " % (str(23)) + str(GPIO.input(23))) #shows '1'
print("Pin %s status is: " % (str(24)) + str(GPIO.input(24))) #shows '0'
print("Pin %s status is: " % (str(25)) + str(GPIO.input(25))) #shows '0'
print("Init sequence Complete")

Answer 1

There appear to be two possibilities.

1. something is connected to GPIO 24 and GPIO 25 which is pulling those GPIO low.
2. The Pi is broken.

I suggest you remove everything from the expansion header and run one or both of wiringPi's pintest or (my) pigpio's gpiotest.