Config.txt max_usb_current=1 ?
If your using a Pi 3 or 4 that doesn’t do anything and isn’t needed. The default is max anyway.
You could try hdmi_force_hotplug=1
Or plugging the screen into a PC as a test.
Unfortunately no luck with the change to the config although I couldn’t see the max usb line but that shouldn’t make a difference from what you’ve told me.
I’ve tried alternative HDMI cables and have tried reconnecting the ribbon cables but no joy unfortunately.
The board is getting power as the light is on but maybe there’s not enough power for the screen?
Thanks. I did use those instructions when constructing the screen which were helpful.
I do have a spare pi power supply and have attached this to the screen itself to power it separately but it is not turning on unfortunately. Again there is power to the board but no picture at all.
The one on the screen itself?
If the locking bar has come out, but didn’t break, it can be put back in. There are a couple of threads here where that happened. If your careful and get it the right way round you may be able to fix it.
That sucks. Sorry to hear it broke. Just a heads up FYI post. Be careful with electronics and carpets. Static electric discharge is deadly to electronics. If you have to walk over a carpet, touch something metal that is grounded to discharge any static build up, before touching anything electronic like a Pi etc. ;)
BertyD,
Did you see anything on the screen at all? A “HDMI” in the top left, or “No signal” in the middle? Also, did you try to power the screen off and on using the Power button on the 5-button control strip?
Yes, I did check and there was no message displayed (“no signal” etc) at all, so it didn’t appear like the screen had turned on.
I tried turning on the screen via the control strip as well and that did appear to turn the board on and off (the light on the board turned on and off ok).
Unfortunately, I am a complete novice so it may have been something I’ve missed.
I will need to get a replacement ribbon from somewhere before I can try again anyway. Not sure where to get one from? I have contacted Pimoroni themselves but they haven’t got back to me as of yet.
The Pi 4B seems to be very finicky about detecting a monitor. Especially if you power them both up at the same time. Powering the monitor up first usually sorts it out, but that’s not an ideal solution in a lot of cases.