# \[HELP\] uConsole (CM4104000) won't boot: Screen flashes once then black, green LED stays solid **URL:** \ **Category:** uConsole\ **Tags:** help\ **Created:** [June 23, 2026, 5:07pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768 "2026-06-23T17:07:15Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![theblackhacker](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/theblackhacker/32/17058_2.png) [@theblackhacker](https://forum.clockworkpi.com/u/theblackhacker)\ **Post date:** [June 23, 2026, 5:07pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/1 "2026-06-23T17:07:15Z")
Hey everyone! I’m hoping someone here has seen this before and can point me in the right direction. I’m running a **CM4104000** (4GB RAM, 0GB eMMC) on the uConsole mainboard. **Symptoms:** - Holding the power button for ~2 seconds causes the screen to flash very briefly (like a single frame), then goes completely black - The machine never boots, just stays dark - The **green LED stays on solid** (not blinking) - The **CM4 chip is warm to the touch** , so it seems like it’s receiving power - **No orange charging LED** appears at all when plugging in the charging cable **What I’ve already tried:** - Reseated all components (CM4, battery, ribbon cables) multiple times - Removed the battery and ran on USB power only, same result - Flashed several different images: official Raspberry Pi OS for CM4, official uconsole images, and various custom images from Rex - Tried different microSD cards, all flashed with different images - **Update 1:** I’ve tried flash Trixie by Rex, not working - **Update 2:** I’ve used a micro-HDMI cable, no output Since the CM4104000 is the **Lite variant (no eMMC)**, it should be booting purely from the microSD, so I’m confused why none of the cards/images work. The missing orange charge LED is also making me suspect something might be wrong with the power board. I’ll attach photos and a short video so you can see the behavior. ![photo_2026-06-24_00-04-32](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/3X/d/3/d3ed28d2af826d7e37cd2ad4a2e166bf890825a7.jpeg) **Video:** [https://files.catbox.moe/4b96ok.mp4](https://files.catbox.moe/4b96ok.mp4) Any ideas? Could this be a mainboard/power board issue, or am I missing something obvious? Thanks in advance! ---
**Author:** ![JesseandGraceandCats](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/jesseandgraceandcats/32/9501_2.png) [@JesseandGraceandCats](https://forum.clockworkpi.com/u/JesseandGraceandCats)\ **Post date:** [June 23, 2026, 5:21pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/2 "2026-06-23T17:21:29Z")
If charging light does not turn orange, it could either be an issue with the battery board or perhaps main board. (Or if you battery is 100%, maybe the charging doesn’t happen then? I haven’t paid attention but I am charging it to see if the light turns green when battery is 100% and I’ll let you know.) However, there could be another issue, the screen is broken. So I would suggest to get a micro HDMI and test it out with an external monitor to see if anything shows. Or maybe use a flashlight to shine on the screen to see if it is the LED panel that is broken. It happened to one of my handheld. Usually, you can see the screen actually is showing patterns, just the LED is not working. PS: I recall that I have had an issue like this before because i didn’t stick the carrier board (adapter board) all the way down deep enough. Since you have reassembled it multiple times, I would say it is not likely the case. But since you are already here, why not push it all the way deep into the mainboard and see what happens. Also, the first boot for me took about 40 seconds before the screen show anything, but I suspect you have already left it alone long enough so I would rule that out too, but just so you know. ---
**Author:** ![white-round-square](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/white-round-square/32/10385_2.png) [@white-round-square](https://forum.clockworkpi.com/u/white-round-square)\ **Post date:** [June 23, 2026, 5:28pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/3 "2026-06-23T17:28:35Z")
> [@theblackhacker](#): > > - Holding the power button for ~2 seconds causes the screen to flash very briefly (like a single frame), then goes completely black it should do it, but boot eventually do you have a mini-hdmi cable and an external display? are you sure you properly flashed images? how did you do it? can you write each step please? ---
**Author:** ![theblackhacker](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/theblackhacker/32/17058_2.png) [@theblackhacker](https://forum.clockworkpi.com/u/theblackhacker)\ **Post date:** [June 23, 2026, 5:37pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/4 "2026-06-23T17:37:04Z")
I’ve try both Etcher and Rasberry Pi Imager, but it all the same I’ll try with a mini-hdmi to see if it work, thanks for the advice ---
**Author:** ![white-round-square](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/white-round-square/32/10385_2.png) [@white-round-square](https://forum.clockworkpi.com/u/white-round-square)\ **Post date:** [June 23, 2026, 5:47pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/5 "2026-06-23T17:47:51Z")
> [@theblackhacker](#): > > I’ve try both Etcher and Rasberry Pi Imager, but it all the same you didn’t apply any custom settings, right? ---
**Author:** ![Toml\_12953](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/toml_12953/32/11925_2.png) [@Toml\_12953](https://forum.clockworkpi.com/u/Toml_12953)\ **Post date:** [June 23, 2026, 5:57pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/6 "2026-06-23T17:57:43Z")
Make sure the power board contacts are fully seated in the slots. The first time I built a uConsole, I screwed the power board all the way down but the system was flaky. I saw the contacts were raised in their slots even though the board was screwed down. I seated the contacts better and the system started responding normally. ---
**Author:** ![theblackhacker](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/theblackhacker/32/17058_2.png) [@theblackhacker](https://forum.clockworkpi.com/u/theblackhacker)\ **Post date:** [June 23, 2026, 6:10pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/7 "2026-06-23T18:10:59Z")
Yeah i think they don’t show anything for me to customize, actually i’m new with Rasberry Pi ---
**Author:** ![theblackhacker](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/theblackhacker/32/17058_2.png) [@theblackhacker](https://forum.clockworkpi.com/u/theblackhacker)\ **Post date:** [June 23, 2026, 6:28pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/8 "2026-06-23T18:28:17Z")
You’re right, I noticed it was still a bit loose and tightened it. However, it didn’t change anything. I just tried charging it with a power bank that has a screen, and it says the input current is 6W, but still no orange led. ![photo_2026-06-24_01-27-55](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/3X/e/0/e0f66ef09e134a792b20905d53123b4ab773d7c0.jpeg) ---
**Author:** ![theblackhacker](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/theblackhacker/32/17058_2.png) [@theblackhacker](https://forum.clockworkpi.com/u/theblackhacker)\ **Post date:** [June 23, 2026, 6:37pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/9 "2026-06-23T18:37:44Z")
Thanks for the advice. I just tried removing and reinserting the adapter board deep into the motherboard, but that didn’t help either. I’m ordering a micro-HDMI cable to test further. ---
**Author:** ![white-round-square](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/white-round-square/32/10385_2.png) [@white-round-square](https://forum.clockworkpi.com/u/white-round-square)\ **Post date:** [June 23, 2026, 7:23pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/10 "2026-06-23T19:23:18Z")
> [@theblackhacker](#): > > but still no orange led. that LED is very finicky. it somehow software controlled and it may not work when uconsole is powered off. I wouldn’t panic about it. my wild guess there is something wrong with image itself. try to follow instruction like this, but **DO NOT APPLY ANY CUSTOM SETTINGS** [![](https://img.youtube.com/vi/sq5S1MM2Pmo/maxresdefault.jpg "Raspberry Pi OS Installation Guide: Installing the Operating System on a Micro SD Card") ](https://www.youtube.com/watch?v=sq5S1MM2Pmo) have you tried `trixie`? as you have cm4 it should work with any sd card and you do not need to update eeprom. > [@Trixie 6.12.y for the uConsole and DevTerm](https://forum.clockworkpi.com/t/trixie-6-12-y-for-the-uconsole-and-devterm/19457): > > Debian 13 Trixie Now Available! Debian is one of the oldest operating systems based on the Linux kernel, and is the basis of many other Linux distributions. The Debian Project is an association of individuals, sharing a common goal: We want to create a free operating system, freely available for everyone. Now, when we use the word “free”, we’re not talking about money, instead, we are referring to software freedom. Features: ClockworkPi-Trixie-6.12.y Desktop and Lite images available. Image bu… ---
**Author:** ![theblackhacker](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/theblackhacker/32/17058_2.png) [@theblackhacker](https://forum.clockworkpi.com/u/theblackhacker)\ **Post date:** [June 23, 2026, 7:33pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/11 "2026-06-23T19:33:57Z")
I’ll give it a try, thank you I’ve just tried Ubuntu, Kali, Bookworm ---
**Author:** ![theblackhacker](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/theblackhacker/32/17058_2.png) [@theblackhacker](https://forum.clockworkpi.com/u/theblackhacker)\ **Post date:** [June 24, 2026, 12:58am UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/12 "2026-06-24T00:58:50Z")
I’ve tried trixie but still no luck. This is my write steps: [https://files.catbox.moe/bwpyh0.mp4](https://files.catbox.moe/bwpyh0.mp4) ---
**Author:** ![theblackhacker](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/theblackhacker/32/17058_2.png) [@theblackhacker](https://forum.clockworkpi.com/u/theblackhacker)\ **Post date:** [June 24, 2026, 9:43am UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/13 "2026-06-24T09:43:34Z")
![photo_2026-06-24_16-42-37](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/3X/0/7/07e9d8f06126fd5935eae34d0d88b90999495654.jpeg) **Update:** I’ve tried with micro-HDMI cable but still no output ---
**Author:** ![white-round-square](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/white-round-square/32/10385_2.png) [@white-round-square](https://forum.clockworkpi.com/u/white-round-square)\ **Post date:** [June 24, 2026, 10:14am UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/14 "2026-06-24T10:14:03Z")
sad. seems like you are doing everything right and I do not see what else could be wrong (I trust everything seated properly and CM4 module “clicked twice” when was inserted into adapter") at this point I see two options: 1. you can buy a “ **Compute Module 4 IO Board** ” _(or one from waveshark)_ to test if your CM4 is actually working and not fried _(but not sure you should do it)_ 2. send email to [alex@clockworkpi.com](mailto:alex@clockworkpi.com) [help@clockworkpi.com](mailto:help@clockworkpi.com) ---
**Author:** ![JesseandGraceandCats](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/jesseandgraceandcats/32/9501_2.png) [@JesseandGraceandCats](https://forum.clockworkpi.com/u/JesseandGraceandCats)\ **Post date:** [June 24, 2026, 2:15pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/15 "2026-06-24T14:15:23Z")
This is sad to hear… I guess the more likely issue is either the main board, or the adapter is broken. Or it could be the CM4, so yeah, get an IO board to see. but even if you found that the CM4 is broken, we still don’t know if it is broken since the beginning, or the board killed it. And it would be too expensive to test it again with another CM4 so… Hope Alex does the right thing and send you all the boards, the adapter, the main board and the battery board, and hopefully the new keyboard and a new screen. We don’t know if they could be the issue either… ---
**Author:** ![white-round-square](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/white-round-square/32/10385_2.png) [@white-round-square](https://forum.clockworkpi.com/u/white-round-square)\ **Post date:** [June 24, 2026, 2:39pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/16 "2026-06-24T14:39:11Z")
> [@JesseandGraceandCats](#): > > and hopefully the new keyboard and a new screen. and new case too what if it also defective and shorts cm4! ---
**Author:** ![JesseandGraceandCats](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/jesseandgraceandcats/32/9501_2.png) [@JesseandGraceandCats](https://forum.clockworkpi.com/u/JesseandGraceandCats)\ **Post date:** [June 24, 2026, 4:34pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/17 "2026-06-24T16:34:04Z")
> [@white-round-square](#): > > what if it also defective and shorts cm4 That is indeed a possibility we cannot simply rule out… ---
**Author:** ![theblackhacker](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/theblackhacker/32/17058_2.png) [@theblackhacker](https://forum.clockworkpi.com/u/theblackhacker)\ **Post date:** [June 24, 2026, 6:51pm UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/18 "2026-06-24T18:51:48Z")
Dont worry i’m in Vietnam and technically we can fix anything here with the price of a starbucks. Tomorrow I’ll hauling this thing to a phone repair shop and letting the professionals figure out what dark magic they can pull off 😓 Thank you guys so much for your help 🙏 ---
**Author:** ![simpsonq0628-stack](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/simpsonq0628-stack/32/17019_2.png) [@simpsonq0628-stack](https://forum.clockworkpi.com/u/simpsonq0628-stack)\ **Post date:** [June 30, 2026, 1:51am UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/19 "2026-06-30T01:51:58Z")
Any update on your current situation? ---
**Author:** ![theblackhacker](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/theblackhacker/32/17058_2.png) [@theblackhacker](https://forum.clockworkpi.com/u/theblackhacker)\ **Post date:** [June 30, 2026, 10:16am UTC](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768/20 "2026-06-30T10:16:23Z")
I bought a new board and tested my CM4 Lite, found my CM4 has been died. I just bought a new CM4 Lite and verified that it works with that new board; now I’m going to try flashing an image to it and see if it work with uConsole. [Next page](https://forum.clockworkpi.com/t/help-uconsole-cm4104000-wont-boot-screen-flashes-once-then-black-green-led-stays-solid/22768.md?page=2)