Cannot get video work on Rasberry Pi 4

[dementor5457]

Hi,

I've recently purchased a Raspberry Pi 4 4GB. Unfortunately I cannot get any video output in any way.

It is definitely not a boot problem, because I enabled SSH and it connects without a problem.
The LEDs don't indicate any problem either.

I tried the HDMI output, both ports (but only HDMI-0 should work anyway), enabled hdmi_safe option, tried config_hdmi_boost with higher values, nothing helped.
I tried the composite video output too, no luck either.

If I take the same SD card out and put it in my Raspberry Pi 2 B+ I get both HDMI and composite video.

I have the latest Raspbian Buster image on the SD card and used apt to update everything to the latest version.
I also tried NOOBS.

Is it possible that I got a faulty unit? Is there a way to test it?
Any idea/help is appreciated.

[aBUGSworstnightmare]

Pleaee provide some details on your display i.e. by letting us know the output of the commands described here https://www.raspberrypi.org/documentati ... -config.md

[Gasmeat]

I have the same problem! Here's my config.txt

Code: Select all

# 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=30
#overscan_right=-5
#overscan_top=-10
#overscan_bottom=-10

# 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 the lirc-rpi module
#dtoverlay=lirc-rpi

# 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]
#dtoverlay=vc4-fkms-v3d

# NOOBS Auto-generated Settings:
#hdmi_force_hotplug=1

[dementor5457]

Pleaee provide some details on your display i.e. by letting us know the output of the commands described here https://www.raspberrypi.org/documentati ... -config.md

Thank you for you quick reply.

I did not know about the tvservice tool. With that I could find out that the Raspberry Pi probably cannot set the group and mode properly. I also checked /var/log/syslog and found the error message of the drm-vc4 driver saying that an invalid EDID had been read.

The only possible cause that I can think of is the cheap micro HDMI adapter I bought. This would explain why it works with my RPi2. I'll buy a proper cable and try again.

Edit: Yep, it was the adapter. Works flawlessly with a proper micro HDMI cable.

[fornitsumfornis]

So I'm not sure why it worked exactly, but I uncommented out the following line in my config.txt

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

Then I set it up and rebooted and the screen came back on when it rebooted! (I had it working a few days ago but the screen when blank when I rebooted and never got it back).