Just got my uconsole. So i am new to this community. Will my cm4 8gb 32emmc not work with sdcard image? That is , i get a black screen only. Checked the connectors, cm4 orientation., check mem slot seating and display cable. Still no joy… any help??
@Sam_Chevalier I was told by @white-round-square that if you have compute module with an emmc, you will not be able to use the sd card.
Idk what you should do in this case. Most probably try to connect your uconsole to the internet and the rpi cm4’s default os installation screen should appear…
see this thread Update: uConsole shipping related - #3018 by white-round-square
@Sam_Chevalier I did some research and found out that without a cm4-io-base board you can’t flash an image to emmc 
I have the same cm4 module as yours and will have the same problems after receiving my uconsole.
Therefore, you need to get this board 
Amazon.com: Mini Base Board for Raspberry Pi Compute Module 4 Lite/EMMC Series Module, with Standard CM4 Socket and Color-Coded Raspberry Pi 40PIN GPIO Header, for Evaluating CM4 or Integrated into End Product : Electronics
and follow the official instructions, in order to flash an image to the cm4 with an emmc 
https://www.waveshare.com/wiki/Write_Image_for_Compute_Module_Boards_eMMC_version
on the bright side, with this board you can later use cm4 module as standalone RPi
Bummer. I will give both suggestions a try. Thanks for the help. I dug up alot after seeing some of the posts.
With the latest firmware, can you boot to USB and then “install” the OS to the emmc? I thought that was one of the newer features from a couple years ago, but might be wrong.
@Greg_E Interesting, it would be the best thing for us right now, but I have never heard about such possibility. Is there any url to the detailed instructions ?
I have tried to use both a usb-c to usb-c to my laptop and usb-c to usb-a on both usb ports on the uconsole and still no joy 
, but I will continue to research. I did get the waveshare carrier board so, i will have wait patiently for that to come by the end of the week 
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@Sam_Chevalier let us know if you succeed without the base board, that would be awesome !!!
As I understand it you have to set the nRPIBOOT to 0 (pin 93 to ground) to stop the CM4 booting from the eMMC and enable you to use another computer to run rpiboot and access the eMMC as storage. This is the only way i know of that you can write an OS to the eMMC.
An IO board provides a jumper to allow you to do this easily but…
Looking at the schematic for the CM4 adaptor board there appears to be a DIP switch on the board that allows you to set nRPIBOOT and EEPROM_nWP. I haven’t found any pictures of the adaptor board that have allowed me to confirm it exists and if it is easy to access by just removing the uConsole back cover.
When i get my uConsole on Friday I will let you know if no one else does first.
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@graynada your post motivated me to look for schematics and I found these below:
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I have a cb2 which is a cm4 card 2gb 32gb emmc with the switch as a button, I did try rpiboot and unfortunately not successful.
Hey there!
I have a cm4 with emmc. The only way to flash the os is by using another board that supports the flash function. This isn’t something that was added to the uconsole. I use the official raspberry pi ip board, but there are other boards made by other companies, Google cm4 carrier boards and check the descriptions.
I’ve never used a lite version in a uconsole, but I am very pleased with my emmc model.
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Hi @Caljank, which emmc version did you use, and was it enough for you ? what are the most common obstacles that you experienced ?
I have the 32 gb emmc 8 gb ram. The 32gb is restricting if you tend to have allot of files that you want to go with you. That was about it. I did overclock it a bit (can’t remember how much, and recently reflashed bookworm). Um… If you want to try all the different os possibilities that this forum has to offer the emmc version is a pain compared to swapping out memory cards.
EDIT:
I found my overclock settings
Sudo nano /boot/firmware/config.txt
[pi4]
max_framebuffers=2
arm_freq=1800
gpu_freq=750
over_voltage=5
[all]
gpu_mem=256
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the current clockwork v5 mainboards don’t support USB boot, v4 ones could do it but they had a power off issue with the CM3 and the fix for that broke usb boot
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Can I ask when you placed your order? I ordered mine in November and just wondering what the wait time is.
Thanks.
October (No CM4) model
Thank you! Hopefully that means I am not too far off.