Xtool D9 Pro User Manual page 109

Generally caused by network instability, please switch to a more stable
network and try to activate again.
⚫ For 'Registration Failed'
Generally, it is caused by the connection timeout or the sending timeout,
please check whether you have blocked the outgoing network traffic to
non-US regions like China. We recommend that you unblock and try to
register again.
Q10: FAILED TO TURN ON WHEN CHARGING
In the charging state, you need to first press the power button to light up
the screen (showing the charging status). Then press and hold the power
button for 4-5 seconds until the boot animation is shown on screen.
Q11: FAILED TO OPEN THE DIAGNOSIS APP WITH PROMPT
"SYNC YOUR DEVICE. THE DEVICE HAS BEEN OFFLINE FOR
MORE THAN 30 DAYS. YOU SHOULD CONNECT INTERNET SYNC
DEVICES TO THE NETWORK STATUS!"
The tablet has to connect to the network every 30 days, otherwise, the
diagnosis app will be locked and disabled until the device is connected to
the network. If you have ruled out the network problem and ensured that
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