If not solved, feedback information can be given to store "mobile phone model + system version". Updated version of mobile phone system may lead to black screen screen, and software can be downloaded and used again.If you don't need it for a long time, please keep it as full of electricity as possible. It's better not to use the product while punching.If picture delay occurs, channel can be adjusted in software settings, or output resolution can be adjusted appropriately.If there is a black screen, please check whether the mobile phone is allowed to open when the software is installed, and check whether the lens is normal.If a few mobile phones can not be used, automatic identification can be turned off in the WLAN+ ![]() Some mobile phones have exclamation marks after WiFi connection, which means that the mobile phone can not identify the signal on the Internet, does not affect the use of mobile phones.
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