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→Attach and secure the knobs
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[[File:capture000158_fixed_1024.jpg|600px|right]]+
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'''6.''' '''Congratulations!''' Your Zynthian V5.1 is ready to boot for the first (or second??) time. '''If you didn't yet''', it's time to '''[[Zynthian Software|burn a SD-card with the latest zynthian software image]]'''. Please, use a good quality SD-card and follow the [[Zynthian Software|instructions]] carefully.
'''6.''' '''Congratulations!''' Your Zynthian V5.1 is ready to boot for the first (or second??) time. '''If you didn't yet''', it's time to '''[[Zynthian Software|burn a SD-card with the latest zynthian software image]]'''. Please, use a good quality SD-card and follow the [[Zynthian Software|instructions]] carefully.
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+[[File:capture000158_fixed_1024.jpg|600px|right]]
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+Note that the wiring kit should include a little tool to help inserting/removing the SD-card. It's a small rectangular piece of black-anodized aluminum with the zynthian logo, like shown in the picture:
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First boot could take some time. Don't be impatient and wait until you see the splash screen with the logo. If the display remains black after 1 minute, please, re-check the [[Zynthian Software|instructions]] and re-burn the SD-card again. If this still don't work, try with a different SD-card before reporting in the [https://discourse.zynthian.org forum]. For solving SD-card issues, it could be useful to [https://raspberrytips.com/green-and-red-light-on-raspberry-pi check the RPi5 status LEDs].
First boot could take some time. Don't be impatient and wait until you see the splash screen with the logo. If the display remains black after 1 minute, please, re-check the [[Zynthian Software|instructions]] and re-burn the SD-card again. If this still don't work, try with a different SD-card before reporting in the [https://discourse.zynthian.org forum]. For solving SD-card issues, it could be useful to [https://raspberrytips.com/green-and-red-light-on-raspberry-pi check the RPi5 status LEDs].
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−If the first boot did not finish right and you did not get into the zynthian user interface, you should carefully re-check the wiring before trying again:
+* '''If the display remains black''', you should check the display cable connection.
+* '''If you get the ERROR screen''', most probably your control board is not being detected and you should check the control-1 cable connection.
+You should check both sides of connection. Check that orientation is correct, the cable is well inserted and the connector totally closed. If it still doesn't work, you could look for damaged cable contacts, solder bridges on the PCB connectors, etc.
+<br>
+{{WarningBox|AFTER A FAILED FIRST BOOT, YOU SHOULD NOT BOOT AGAIN WITH THE SAME SD-CARD AS IT IS.}}
+<br>
+If hardware can't be detected, the SD-card is configured as "custom hardware" and first boot is disabled. You must re-burn the SD-card or reset the SD-card from the terminal with this command:
+ set_first_boot.sh
+You can reach the terminal from webconf or using SSH.
+From the terminal, you can check the first boot log with this command:
+ cat /root/first_boot.log
+This could help you to understand what is going wrong. You should include this log when asking for help in the forum.
+Also, when reporting first boot issues, it could be very helpful to include the output of this command:
+ i2cdetect -y 1
+When everything is OK you should get something like this:
+ 0 1 2 3 4 5 6 7 8 9 a b c d e f
+ 00: -- -- -- -- -- -- -- --
+ 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+ 20: 20 21 -- -- -- -- -- -- -- -- -- -- -- -- -- --
+ 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+ 40: -- -- -- -- -- -- -- -- -- -- UU -- -- UU -- --
+ 50: -- -- UU -- -- -- -- -- -- -- -- -- -- -- -- --
+ 60: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+ 70: -- -- -- -- -- -- -- --
+If things are not working OK, you could get something like this, for instance
+ 0 1 2 3 4 5 6 7 8 9 a b c d e f
+ 00: -- -- -- -- -- -- -- --
+ 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+ 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+ 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+ 40: -- -- -- -- -- -- -- -- -- -- 4a -- -- 4d -- --
+ 50: -- -- 62 -- -- -- -- -- -- -- -- -- -- -- -- --
+ 60: 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+ 70: -- -- -- -- -- -- -- --
−Note that the wiring kit should include a little tool to help inserting/removing the SD-card. It's a small rectangular piece of black-anodized aluminum with the zynthian logo, like shown in the picture:
+Note the absence of the chips addressed in 20 & 21 (2 x MCP23017). This means your control board is not being detected and most probably is not well connected.
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