Hisense 55U8GQ Service Manual page 43

3、ISP_Tool connected failure
 Close the SecureCRT, check whether " " in front of "UseSWI2C" of "Config" .
4、 ISP_Tool
If connected appear error " Device not selected,yet";
 Reduce the I2C speed setting figure lower "Roughly speed" about "200KHz" and have a try.
5、After USB upgrade, appear "
mtdoops: mtd device (mtddev=name/number) must be supplied，Kernel
panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,4)"
Reason: After burn mboot and before USB upgrade, forget to clear the zone schema.
 Don't burn mboot again，ONLY restart TV with "cu" demand to USB upgrading again
in mboot .
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