Hi,
I have burnt the latest stable PBP image to an sd card, but after insertion and booting the display stays black (even though the light is on).
The output of lsblk (on my laptop) looks like
```
mmcblk0 179:0 0 29.5G 0 disk
├─mmcblk0p1 179:1 0 228M 0 part
└─mmcblk0p2 179:2 0 4.1G 0 part /run/media/key/pmOS_root
```
which could be a problem maybe - there is no boot partition on mmcblk0p1 (I remember there was when recently I had flashed a manjaro image...)?
BTW for burning to sd I used the standard command,
```
dd if=some.img of=/dev/mmcblk0 bs=4M status=progress
```
It would be awesome if someone could help!! Thanks!
(02-19-2025, 12:45 PM)zkajdan Wrote: Hi,
I have burnt the latest stable PBP image to an sd card, but after insertion and booting the display stays black (even though the light is on).
Do you have Tow-Boot loaded on the SPI?
Here is my screen when I turn it ON.
![[Image: attachment.php?aid=2913]](https://forum.pine64.org/attachment.php?aid=2913)
(02-19-2025, 01:43 PM)mikehenson Wrote: (02-19-2025, 12:45 PM)zkajdan Wrote: Hi,
I have burnt the latest stable PBP image to an sd card, but after insertion and booting the display stays black (even though the light is on).
Do you have Tow-Boot loaded on the SPI?
Here is my screen when I turn it ON.
Thanks for the reply @ mikehenson !
When I turn it on (without SD card inserted) the screen remains completely dark...
This never happened before and I have no idea why it does...
When the PBP came, it had manjaro installed, which broke after an upgrade... I burnt a fresh version of Manjaro on the sd, booted from sd, and before I could do anything to the emmc I had the network-couldn't-connect problem from the other thread... and then I tried to install postmarket OS from sd...
Now I have the screen remaining dark whether I boot from SD or without...
BTW I never changed the boot order - in the wiki they write that to boot from sd, you have to perform some manual actions, but in fact I didn't have to, that time I booted Manjaro from sd...
Do you have an idea what I could do? Thanks again!!
(Yesterday, 01:13 AM)zkajdan Wrote: Do you have an idea what I could do? Thanks again!!
I think you need to get Tow-Boot on the SPI.
I am not sure pine64 uses the wiki anymore, I think they moved everything to "documentation"
From the RK3399_boot_sequence
- loading from NOR flash on SPI1
- loading from NAND flash on SPI1
- loading from eMMC
- loading from SD on the SDMMC controller
- bringing up the OTG0 USB controller in device mode and accepting control transfers to load programs
The eMMC may have an issue booting. You may need to Disable the eMMC so you can boot off the SD. Once booted off the SD, I personnally would try to get Tow-Boot on the SPI.
(Yesterday, 09:09 AM)mikehenson Wrote: (Yesterday, 01:13 AM)zkajdan Wrote: Do you have an idea what I could do? Thanks again!!
I think you need to get Tow-Boot on the SPI.
I am not sure pine64 uses the wiki anymore, I think they moved everything to "documentation"
From the RK3399_boot_sequence
- loading from NOR flash on SPI1
- loading from NAND flash on SPI1
- loading from eMMC
- loading from SD on the SDMMC controller
- bringing up the OTG0 USB controller in device mode and accepting control transfers to load programs
The eMMC may have an issue booting. You may need to Disable the eMMC so you can boot off the SD. Once booted off the SD, I personnally would try to get Tow-Boot on the SPI.
Thank you @ mikehenson !! That's good to know about the documentation!
I don't have any time today, but I'll try to do as you said tomorrow!
(Yesterday, 02:42 PM)zkajdan Wrote: (Yesterday, 09:09 AM)mikehenson Wrote: (Yesterday, 01:13 AM)zkajdan Wrote: Do you have an idea what I could do? Thanks again!!
I think you need to get Tow-Boot on the SPI.
I am not sure pine64 uses the wiki anymore, I think they moved everything to "documentation"
From the RK3399_boot_sequence
- loading from NOR flash on SPI1
- loading from NAND flash on SPI1
- loading from eMMC
- loading from SD on the SDMMC controller
- bringing up the OTG0 USB controller in device mode and accepting control transfers to load programs
The eMMC may have an issue booting. You may need to Disable the eMMC so you can boot off the SD. Once booted off the SD, I personnally would try to get Tow-Boot on the SPI.
Thank you @mikehenson !! That's good to know about the documentation!
I don't have any time today, but I'll try to do as you said tomorrow!
@ mikehenson I burnt Tow-Boot to SPI, which worked great, but then after removing the sd card screen still remained black, so removed the back cover, and maybe the emmc switch had been labeled "the other way round", it looked like off, so anyway I switched it and then, everything would have worked just as you said ...
But, unfortunately I hadn't read the instructions about what not to do when removing the back cover, and I broke the plastic stuff fixing the screen... and so, ruined it :-((((((
Anyway, many thanks again, it would have worked great really.
(Today, 07:33 AM)zkajdan Wrote: But, unfortunately I hadn't read the instructions about what not to do when removing the back cover, and I broke the plastic stuff fixing the screen... and so, ruined it :-((((((
OHH!! NO!!! I am sorry to hear you broke it.
(Today, 07:33 AM)zkajdan Wrote: mikehenson I burnt Tow-Boot to SPI, which worked great, but then after removing the sd card screen still remained black, so removed the back cover, and maybe the emmc switch had been labeled "the other way round", it looked like off, so anyway I switched it and then, everything would have worked just as you said ...
But, unfortunately I hadn't read the instructions about what not to do when removing the back cover, and I broke the plastic stuff fixing the screen... and so, ruined it :-((((((
Anyway, many thanks again, it would have worked great really.
luckily you should be able to repair it! https://pine64.com/product-category/pine...are-parts/
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