JC T7 T8 NAND Hard Disk Test Fixture Mainboard Boot Brush Tester Option1: JC T7 Logic Board Restore repair tool For 6/6S/6SP/7/7P Option2: JC T8 NAND Test Fixture For Iphone8/8P Connection: Connect the mainboard with JC C1 LINE Repair Cable(PRK154), No battery required. Put the right NAND test fixtue with iPhone motherboard Put the Nand Flash Test Adapter head on the Test Fixture base plate Put Nand Flash in the tester head Connect the computer, using latest itunes, then you can Restore / Reinstall / Re-Flash iOS Firmware to test the Nand Flash, and repair iphone restore fast testing iPhone 8 8P NAND (Good / Bad status), and iphone 8 Plus motherboard trouble Test Fixture error: error 4014 (NAND bad / good error ), error 9 (First show:NAND connection error,End show:NAND bad / good error ) error 1(motherboard error) error 14(itunes update error) error 53 (fingerprints error). Package List: JC T7/T8 NAND Hard Disk Test Fixture