It may be a system problem. Please try it first. If it doesn't work, the screen problem is more likely. Do a comprehensive overhaul after delivery. 1. First of all, everyone should brush Recovery first, and at the same time, press and hold the volume+,HOME button and power button to enter. 2. There will be some English in the process of brushing Recovery. Of course, the interface of different versions will be different, but they are basically the same. Rebootsystemnow, restart installzipfromSDcard, and brush the zip upgrade package wipedata/ Factoryreset clears user data and restores factory settings wipecachepartition clears system cache backupandrestore Backup and restore system mountsandstorage Mounting and storage options advanced advanced settings Note: ① Some recovery versions do not have the installzipfromSDcard option, so you can choose the applySDcard：update.zip option. ② The volume key controls the options, and the HOME key determines. InstallzipfromSDcard interface choosezipfromsdcard Select the brush package Apply/SD card in zip format from the external card/ Update.zip upgrade the update.zip brush package in the SD card togglesignatureverification verification signature togglescriptasserts script statement choosezipfrominternalsdcard Select the brush package in zip format from the built-in card+++GoBack+++Return 3. System backup and recovery (multiple backups are possible): ① Select Backup and Recovery in the main interface; ② Select Backup, and then a string of English will appear at the bottom of the screen until backupcomplete and the backup is successful; ③ Select backupandrestore, and then a backup list will appear, showing different backup times and selecting the corresponding backup recovery system. 4, double clear (double wipe): separate the double clear content of the main page to wipe the user data and restore the factory settings. wipecachepartition clears the system cache. After learning how to brush Samsung note3, let's take a look at how it swipes ROM, for your reference only. ① select installzipfromSDcard； in the main interface; ② Choose ChooseZipFromSDCard (the ROM package is placed in the built-in card and choose ChooseZipFromInternalsCard); ③ Select your downloaded ROM package from the folder list that appears; After that, a string of English will appear at the bottom of the screen until installfromsdcardcomplete is successfully swiped; ④ Select Goback to return to the main interface, and select rebootsystemnow to enter the new system.