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RPI4B Not booting up when connecting the dsi cable.
Posted: 2024-04-24 19:36
by Lili123
Hi, my problem is that I bought the 7inch display with touchscreen, and each time I try to boot with it while having the DSI cable connected to the display port the raspberry pi 4 B won't read the SD card ( the green LED just won't flash). I know for sure that the problem isn't my raspberry pi since i have tried booting without the DSI cable plugged in and it works. Please help !!
Re: RPI4B Not booting up when connecting the dsi cable.
Posted: 2024-04-25 1:35
by Luckfox Taylor
Stay calm, I'll help you investigate the issue. Before we proceed, we need to confirm a few things:
1. What is the kernel version of your system? You can check it using uname -a.
2. Please take a photo of how you have connected your Raspberry Pi to the display.
3. Let's take a look at your config.txt configuration file.
Re: RPI4B Not booting up when connecting the dsi cable.
Posted: 2024-04-25 21:47
by Lili123
hello,
first of all sorry for my late reply, and thank you for your reply. i unfortunately cannot provide you with the kernel version of the system since i do not have a screen at the moment. i have one picture showing the connection on the RPI4B's side(disconnected to show the direction of the pins)
and one for the screens side, also disconnected to show the pins direction.
. here is what is written inside the config.text file:
Code: Select all
# For more options and information see
# http://rptl.io/configtxt
# Some settings may impact device functionality. See link above for details
# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on
# Enable audio (loads snd_bcm2835)
dtparam=audio=on
# Additional overlays and parameters are documented
# /boot/firmware/overlays/README
# Automatically load overlays for detected cameras
camera_auto_detect=1
# Automatically load overlays for detected DSI displays
display_auto_detect=1
# Automatically load initramfs files, if found
auto_initramfs=1
# Enable DRM VC4 V3D driver
dtoverlay=vc4-kms-v3d
max_framebuffers=2
# Don't have the firmware create an initial video= setting in cmdline.txt.
# Use the kernel's default instead.
disable_fw_kms_setup=1
# Run in 64-bit mode
arm_64bit=1
# Disable compensation for displays with overscan
disable_overscan=1
# Run as fast as firmware / board allows
arm_boost=1
[cm4]
# Enable host mode on the 2711 built-in XHCI USB controller.
# This line should be removed if the legacy DWC2 controller is required
# (e.g. for USB device mode) or if USB support is not required.
otg_mode=1
[all]
dtoverlay=vc4-kms-v3d
dtoverlay=vc4-kms-dsi-7inch
thank you for trying to help me.
With kind regards
Re: RPI4B Not booting up when connecting the dsi cable.
Posted: 2024-04-26 1:58
by Luckfox Taylor
Make sure the metal side of the ribbon cable at the display end is facing upwards when connecting. Also, check if the power supply is a standard 5V 3A. If the power supply is 5V 1A or lower, it may not be able to power both the Raspberry Pi 4 and the 7-inch screen simultaneously.
Re: RPI4B Not booting up when connecting the dsi cable.
Posted: 2024-04-26 6:53
by Lili123
Hello,
The metal side of the ribbon is connected right. I am sure it is on the right side and connected right. My power supply is a 5V 3A. I have previously been able to connect the RPI4B to a display similar to yours, but had to change to the one you sell for space Reasons.
With kind regards
Re: RPI4B Not booting up when connecting the dsi cable.
Posted: 2024-04-28 9:12
by Eng33
Hello
I'm very sorry. The colleague you contacted earlier is temporarily on leave due to physical reasons, which has caused a delay in our response.
Please ensure or test the following methods:
1. Make sure the connection is normal. The connection method in the picture above is wrong, and the FPC does not seem to be provided by us ，Make sure the FPC is provided by us
2. If the above does not solve your problem, please try changing the system version of Raspberry Pi, such as Bullseye
Re: RPI4B Not booting up when connecting the dsi cable.
Posted: 2024-07-04 14:52
by Dybala
Luckfox Taylor wrote: ↑2024-04-26 1:58
Make sure the metal side of the ribbon cable at the display end is facing upwards when connecting. Also, check if the power supply is a standard 5V 3A. If the power supply is 5V 1A or lower, it may not be able to power both the Raspberry Pi 4 and the 7-inch screen simultaneously.
When connecting the display, ensure the metal side of the ribbon cable faces upwards. Verify that your power supply is a standard 5V 3A; a 5V 1A supply might not be sufficient to power both the Raspberry Pi 4 and the 7-inch screen simultaneously. Proper setup ensures optimal performance.