No OSD when powered via a computer USB port

[Omar-Steitieh]

I have used the automatic installation guide. " curl -sSL https://pisupp.ly/anybeaminstall | sudo bash "

1- choose the default mode
2- the reboot, the screen stays stuck on the rainbow screen and the projector is displaying the Nebra beam white screen

#Heres the config.txt file:
#For more options and information see
#http://rpf.io/configtxt
#Some settings may impact device functionality. See link above for details

#uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

#uncomment this if your display has a black border of unused pixels visible
#and your display can output without overscan
#disable_overscan=1

#uncomment the following to adjust overscan. Use positive numbers if console
#goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

#uncomment to force a console size. By default it will be display's size minus
#overscan.
#framebuffer_width=1280
#framebuffer_height=720

#uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

#uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

#uncomment to force a HDMI mode rather than DVI. This can make audio work in
#DMT (computer monitor) modes
#hdmi_drive=2

#uncomment to increase signal to HDMI, if you have interference, blanking, or
#no display
#config_hdmi_boost=4

#uncomment for composite PAL
#sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

#Uncomment some or all of these to enable the optional hardware interfaces
dtparam=i2c_arm=on
#dtparam=i2s=on
dtparam=spi=on

#Uncomment this to enable infrared communication.
#dtoverlay=gpio-ir,gpio_pin=17
#dtoverlay=gpio-ir-tx,gpio_pin=18

#Additional overlays and parameters are documented /boot/overlays/README

#Enable audio (loads snd_bcm2835)
dtparam=audio=on

[pi4]
#Enable DRM VC4 V3D driver on top of the dispmanx display stack
#dtoverlay=vc4-fkms-v3d
#max_framebuffers=2

[all]

#AnyBeam
dtoverlay=dpi24
overscan_left=0
overscan_right=0
overscan_top=0
overscan_bottom=0
framebuffer_width=1280
framebuffer_height=720
enable_dpi_lcd=1
display_default_lcd=1
dpi_group=2
dpi_mode=85
dpi_output_format=0x070027

The SD card is brand new and the raspberry Pi was configured using raspberry Pi imager

What would the problem be?

[232485]

I am also facing the same issue. I have configured & rebooted about 15 times and I was successful only once that too with the reddish screen with RPI logo. What could the issue be?

Note: I am using RPI 4B Model B (8GB) and Nebra in Mode 1. The Nebra HAT was shipped with one solder jumper unsoldered. The rest were soldered. I assume it was missed during manufacturing as per the images in the documentations. So, I ended bridging the solder jumper.

[jdimpson]

I tried raspbian 11 (bullseye) with no luck. It just displayed the white Nebra logo. Seems like the config.txt settings don't currently work in bullseye; lots of things changed, and it seems like the support for this kind of display is among them.

So i installed raspbian 10 (buster) which works for me just find.

[232485]

@jdimpson I tried Raspbian 10 (Buster) as per your recommendation. The OS detects or at least enables the DPI LCD and the same can be seen the Screen Configuration. But still no image on the Nebra apart from the standard Nebra Logo.

[232485]

Successful at last. Issues with solder jumper (dry solder) that came by default on-board.

[shawaj]

A computer USB port will probably not have enough power to power both the pi and the projector. We recommend 2.5 of 3 Amps for both

[232485]

@shawaj Powering the Pi and Projector using a 5V, 3.5A power supply. That wasn't an issue. Firstly it had to do with the latest Bulls Eye OS and 2ndly the on-board Solder jumpers.

[MoorPoor]

hei
If not solved yet.
try to uncomment all of the following lines:

# dtparam=i2c_arm=on
# dtparam=i2s=on
# dtparam=spi=on