>the PBP booted showing the u-boot screen
Maybe you mean the login screen? Most (nearly all) uboots only display over serial
>I also read that it is possible to boot the PBP without eMMC. That does not work with my PBP.
I think you need a "hard reset", the button inside OR hold pwr button for 20+ seconds
(since pbp has a battery, if it gets into a 'bad state' it can remember that state)
Maybe the uboot on emmc (which has priority) is defective OR maybe some video mismatch
The blinking leds suggest a uboot problem
I suggest leaving emmc out until you get a reliable boot, then you always have a 'fall back"
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wifi firmware,, since it seemed to work OK, I am still on the 1st firmware version, that is, I pinned it
(late 2019) For some reason, when the update in 2020 came out, it only helped some people, not all
Not clear what is right or wrong
Maybe you mean the login screen? Most (nearly all) uboots only display over serial
>I also read that it is possible to boot the PBP without eMMC. That does not work with my PBP.
I think you need a "hard reset", the button inside OR hold pwr button for 20+ seconds
(since pbp has a battery, if it gets into a 'bad state' it can remember that state)
Maybe the uboot on emmc (which has priority) is defective OR maybe some video mismatch
The blinking leds suggest a uboot problem
I suggest leaving emmc out until you get a reliable boot, then you always have a 'fall back"
------
wifi firmware,, since it seemed to work OK, I am still on the 1st firmware version, that is, I pinned it
(late 2019) For some reason, when the update in 2020 came out, it only helped some people, not all
Not clear what is right or wrong