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bootloader - raspberry pi won't boot after some bootcode.bin update
Question/posting: After performing a system update a few days ago, my raspberry pi does not boot up anymore.

Thread/answer has a number of good postings including suggestion to replace the boot loader (/boot folder and/or start.elf file).
boot  bootloader  raspberrypi  raspbian  adtinc 
4 days ago by cyberchucktx
New Pi 3 B+ not booting - ModMyPi | Forum
Question/post: I ordered 2 X RPi 3B+ (order date 14 Mar 2018 12:36:10 GMT ) and have used it twice. But now one has failed as it now gives a thunder icon on the boot screen with no further booting.

Many answers in the thread, some suggest replacing the boot loader (start.elf)
raspbian  raspberrypi  boot  adtinc  bootloader  modmypi 
4 days ago by cyberchucktx
Fix for "Not booting on new Raspberry Pi Model 3 B+"
Hi everyone,

i have a brand-new Model 3 B+ and it seems that openhabian is not working with it.
Rainbow screen comes up and the green LED blinks 8 times, red LED is off.
Regarding to this website (,
this means "SDRAM not recognised. You need newer bootcode.bin/start.elf firmware."

I used release 1.4

> Replacing the start.elf with the newest Raspian start.elf fixed it.
raspbian  boot  bootloader  bug  raspberrypi  adtinc 
4 days ago by cyberchucktx
This seems not to work for Joerg at Cristie; Servergraph still attempts to start before a DHCP IP address is available, perhaps because I didn't check 'the right wait service':

If you need to delay you service after the network is up, include
in the .service file.

This will ensure that all configured network devices are up and have an IP address assigned before the service is started. will time out after 90s. Enabling this might considerably delay your boot even if the timeout is not reached.

The right "wait" service must be enabled too (NetworkManager-wait-online.service if NetworkManager is used to configure the network, systemd-networkd-wait-online.service if systemd-networkd is used, etc.). systemd-networkd.service has Also=systemd-networkd-wait-online.service in its [Install] section, so when systmed-networkd.service is enabled, systemd-networkd-wait-online.service will be enabled too, which means that will include systemd-networkd-wait-online.service when and only when systemd-networkd.service is enabled. NetworkManager-wait-online.service is set up similarly. Verify that the right service is enabled (usually only one should be):

$ systemctl is-enabled NetworkManager-wait-online.service systemd-networkd-wait-online.service
systemd  systemctl  network  up  ip  dhcp  address  servergraph  fails  start  on  boot 
12 days ago by theskett

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