PicorePlayer RPI4 - Touchscreen went Black !

[sdiesel77]

I am using a 5v (set at 5.3v) 2A regulated PSU but it seems that it's still not enough one the screen is connected...
The new 10A will not have this issue 😃

[sdiesel77]

Thanks Robert, I decided to order a new powerful regulated PSU of 5v -10A. A bit overkill but at least I won't have power issue anymore.

[sdiesel77]

Anybody has an idea on What happened here please

[sdiesel77]

Thanks Paul for the response.
I tried 2 different usb chargers and none worked for the screens... it's like the USB power input of the screen stopped working....

[sdiesel77]

And now, I have a power logo ⚡ appearing which means I presume the power isn't strong enough...
I could potentially increase the voltage but I still don't understand why suddenly it stopped working with external charger...

[sdiesel77]

[sdiesel77]

It seems I fixed the issue but in a weird way...
I had to add jumpers to take the power from the RPI4 to screen as when using a different adapter via the USB of the screen board, the screens stayed black.
Any idea why?
I never had to use these connections in the past.

[sdiesel77]

Tested today with a new SD card and exactly the same issue unfortunately
I remember that in the past even with Rpi4 off the screen was flickering, here there is nothing it stays black...
I tried a different charger for the screen, same issue.
How can I confirm it's not an issue...

[sdiesel77]

No nothing at all, not even a color flickering


I could try indeed, nothing to lose here.... thx...

[sdiesel77]

[sdiesel77]

Hi All,
Something weird happened with my setup few days ago.
I m using a RPI4 with Picoreplayer and a 7" Touchscreen for years without issue.
The RPI4 and the screen have separate PSU.

The screen went completely black! The RPI is still working well.
I checked...