I need a bit of help as I am at my wit’s end.
Just got a Picade 8" screen and set it up last night, fresh raspberry pi 4 8Gb and a new 64Gb sd with retropie on it, I even went with a fanshim for cooling.
Tried to start it up this morning and got the “No Signal” as is usual so added “hdmi_forse_hotplug=1”.
Now the screen gets a signal, but the actual display will only show for a split second before goes back to a blank screen. I don’t mean the screen powers off or “No Signal” gets displayed, as the backlight is still on, it just goes blank, then after a random period will flash up again then disappear. I can see that the raspberry pi is working from this as between flashes I get:
a flash of boot up
A flash of a red screen
a flash of retro pie logo
a flash of emulation station boot up
and a flash of a blue screen with a grey box.
I don’t get all of these every time as the flashes are not at the same frequency each time.
I have tried every number of config.txt changes from “hdmi_group” and “hdmi_mode”, “hdmi_drive” boosting HDMI signal, disabling overscan and HDMI safe mode.
I have reseated the ribbon cable on the video driver to make sure was aligned, I have even removed the fan shim in case that was it, reseated the XHat and tried every connection, I have also tried two separate micro HDMI to HDMI cables in case something funny was going on.
The last thing I can really think of is checking with my tv to see if the pi will display on that and using a Bluray player on the screen to see if that will work without flicker.
I have searched the board here and other places for this issue but to no avail so I was hoping someone here or Pimaroni staff would be able to advise further.
Any help or advice at this point would be grateful.