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CM4lite modul doesn't boot.

Posted: Thu Sep 15, 2022 6:38 pm
by RainerMohrlok
CM4lite modul doesn't boot.
It is orientated as shown in the manual and I felt the two "clicks" while mounting.
The "green" SD card is inserted. For testing everthing is removed except the USB-C power supply. (Power jumper is set)
Source Ind. LED shines red
Power ON LED shines red
The green LED nearby the Ethernet Connector shines red
But:
The Act LED remains dark as well as any other LED
A monitor connected to the HDMI connector before power up remains dark
So I think the CM4Lite modul doesn't boot.
Does anybody know what may be wrong? is the CM4Lite defect?

Re: CM4lite modul doesn't boot.

Posted: Fri Sep 16, 2022 7:43 am
by Realizator
Hi RainerMohrlok,

Please check that RPIBOOT and USB_CLI jumpers are not installed.

Re: CM4lite modul doesn't boot.

Posted: Fri Sep 16, 2022 9:27 am
by RainerMohrlok
They are not set.
Only the power jumper is set

Re: CM4lite modul doesn't boot.

Posted: Fri Sep 16, 2022 9:51 am
by RainerMohrlok
Two pictures
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B.jpg (47.22 KiB) Viewed 22533 times
A.jpg
A.jpg (56.06 KiB) Viewed 22533 times

Re: CM4lite modul doesn't boot.

Posted: Fri Sep 16, 2022 10:47 am
by Realizator
Your setup looks correct to me.

Is this state stays the same with both micro SD cards from the kit? Coud you please try to boot it with another card. This might be the micro SD imaging process issue (on the factory).

Re: CM4lite modul doesn't boot.

Posted: Fri Sep 16, 2022 11:10 am
by RainerMohrlok
The problem persists with other cards as well
???

Re: CM4lite modul doesn't boot.

Posted: Fri Sep 16, 2022 1:41 pm
by Realizator
RainerMohrlok, I just try to exclude possible issues to understand the problem.

Since all StereoPi have been tested on the factory, I have two last ideas to check:
- micro SD casrd. The card can be damaged or OS image might be written wrongly. That's why I asked you to try the boot with another micro SD card and RaspiOS image on it
- CM4 issue. This is the issue if all other things are working.

If I send you CM4 replacement, and with the new CM4 item you'll have the same issue - it will be just a lost of your time. That's why I'm trying to check all possible reasons to replace exactly the thing causing your issue.

As I understand from your last reply, you've tried another card from the kit, and it doesn't work too. In this case I'd like to ask you to do the last test. Could you please:
- download SLP image from this link: https://www.mediafire.com/folder/nzr90vj8wp1l3/SLP
- image it to the card using Balena Etcher (but not just by copy it to the micro SD card)
- try to power up the device

Re: CM4lite modul doesn't boot.

Posted: Fri Sep 16, 2022 3:12 pm
by RainerMohrlok
the problem is that I tried several other cards which are booting on a standard Raspi 4.
And more important; For example the "green" card boots with a Raspi 4

Re: CM4lite modul doesn't boot.

Posted: Fri Sep 16, 2022 3:18 pm
by RainerMohrlok
I checked the voltages on the CM4Lite, they are ok?
Is there something with the card reader?
Btw. while powering up the Act. LED flashes once for a couple of milliseconds

Re: CM4lite modul doesn't boot.

Posted: Fri Sep 16, 2022 4:59 pm
by Realizator
Uh, okay, thank you very much for the details!

I guess you have no other board compatible with CM4 to test your CM4 module, so let's conciderer our tests as finished.

Could you please write me an email to [my_nickname]@gmail.com, and I'll manage out the replacement delivery for you.

Re: CM4lite modul doesn't boot.

Posted: Tue Sep 27, 2022 5:33 am
by RainerMohrlok
Sorry for late reply.
I checked the voltages with the scope. They look ok.
But nowhere I saw something like a tact signal?
I wrote you an email.

Re: CM4lite modul doesn't boot.

Posted: Thu Oct 13, 2022 4:49 am
by RainerMohrlok
With a new CM4Lite:
It works!!
How to change/repair the defekt CM4Lite?

Re: CM4lite modul doesn't boot.

Posted: Mon Oct 17, 2022 10:15 am
by Realizator
Hi RainerMohrlok,

I'm glad you were able to localize the issue! I've answered your email - please take a look.