Hello!
I’m having a problem with getting my radxa zero 3w to boot from microsd. The device is new - I’ve had it only just a couple of days.
However no matter what I try I cannot get the device to boot from microsd. I get nothing on screen at all - the only sign of life is a green LED and nothing else.
So far I have tried two known good microsd cards (I can verify these are working by wiping and using in other systems). Micro HDMI cable is good too - I can use the same cable with a rpi 4 and I get output via HDMI. Power supply is capable of 5V 3A.
The only difference that I can see is that my device does not have eMMC nor a maskrom button. The box it came in lists it as “Radxa Zero 3W, Model RS107-D2E0H0W15” and after doing a web search on that device it shows as being a 2GB model with no eMMC (both correct).
I tried two images to try to get the 3W to boot. I tried the official image (“Radxa ZERO 3 Debian Build 6”) but I get nothing on screen just a green LED on the 3W. I did try different micro sd cards but nothing seems to happen. I also tried using both dd and balena etcher to write the image but that too makes no difference.
Will also add that the green LED if it supposed to flash or change colour does not it stays on ‘solid’ green throughout.
Can anyone help at all ?
Update:
I have found the cause of the problem!
If I look at the picture on this page and scroll down to a picture just below where it says “Flexible Booting Options” and “Support for Booting from eMMC and Micro SD card” there’s a picture.
The picture shows the micro sd going into the right side of the 3W with the little “bump” on the micro sd card at the bottom and on that picture with the 3W and microsd the microsd card is shown “face down” (that is, any graphic or logo printed on the sd card isn’t shown so we’re looking at the “bottom” of the microsd card which usuallly has nothing printed on it).
That’s what I was trying. In a fit of panic (not really) I tried flipping over the card so the card is “face up” (so I can see the printed logo on the microsd card; in my case it says Samsung 64GB). The little “bump” on the microsd is at the top and not as in the picture at the bottom.
And it booted. So I appear to have an “upside-down” microsd card slot. Weird.
thanks
ljones