Re: green LED flashes 4 times - rpi B 3+ but works USB-boot

From	Björn Lundin <b.f.lundin@gmail.com>
Newsgroups	comp.sys.raspberry-pi
Subject	Re: green LED flashes 4 times - rpi B 3+ but works USB-boot
Date	2021-01-13 19:10 +0100
Organization	A noiseless patient Spider
Message-ID	<rtnd37$fst$1@dont-email.me> (permalink)
References	<rtl2rb$spr$1@dont-email.me> <rtmuru$3sr$1@dont-email.me>

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Den 2021-01-13 kl. 15:07, skrev Chris Elvidge:
> 
>  From the above reference:
> 
> Note that 4-flashes may point to a defective SD-card holder, if one or 
> more of the data contacts is intermittent it can lead to this problem.
> 
> "No SD card" probably can't be differentiated from "Bad SD card holder" 
> as no contact with SD card.


Well, yes, hmm how could I miss that?

the boot order is at 
<https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/bootflow.md>

with a comment

"If there is no SD card inserted, the SD boot mode takes five seconds to 
fail. To reduce this and fall back to USB more quickly, you can either 
insert an SD card with nothing on it or use the GPIO bootmode OTP 
setting described above to only enable USB."

So I halted, inserted a small empty one and boot and now no more 
flashing. Thanks


-- 
Björn

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green LED flashes 4 times - rpi B 3+ but works USB-boot Björn Lundin <b.f.lundin@gmail.com> - 2021-01-12 22:03 +0100
  Re: green LED flashes 4 times - rpi B 3+ but works USB-boot Chris Elvidge <chris@mshome.net> - 2021-01-13 14:07 +0000
    Re: green LED flashes 4 times - rpi B 3+ but works USB-boot Björn Lundin <b.f.lundin@gmail.com> - 2021-01-13 19:10 +0100

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