|
Welcome to the GSM-Forum forums. You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. Only registered members may post questions, contact other members or search our database of over 8 million posts. Registration is fast, simple and absolutely free so please - Click to REGISTER! If you have any problems with the registration process or your account login, please contact contact us . |
|
Register | FAQ | Donate | Forum Rules | Root any Device | ★iPhone Unlock★ | ★ Direct Codes ★ | Direct Unlock Source | Search | Today's Posts | Mark Forums Read |
| LinkBack | Thread Tools | Display Modes |
10-08-2018, 08:33 | #1 (permalink) |
Freak Poster Join Date: Aug 2018 Location: China
Posts: 158
Member: 2861866 Status: Offline Thanks Meter: 71 | [Solution]iPhone 6 Keeps Restarting? – Fix Error 9 14 40 The repair steps as following: 1. Take down the LCD screen assembly 2. Test voltage of the battery with the digital multimeter. Battery voltage is 4.21V, battery test signal voltage is 2.02V. The battery is normal, so we install the LCD screen assembly to check other malfunctions. 3. Failure detection: connect the phone to computer, it could not be restored by iTunes, an unknown error occurred (9) so that we can draw a conclusion that NAND flash or CPU is cracked. 4. Detach the motherboard from the phone, and fix it on PCB holder. 5. Remove the NAND flash chip from motherboard carefully. 6. Clean the bonding pad with the soldering iron, knife, BGA paste flux, rosin, solder wick and PCB cleaner. 7. Connect the NAND flash programmer with the computer, transfer the data from the old NAND flash to a new one. 8. New NAND flash chip BGA rebelling. 9. Install the new NAND flash chip to the motherboard. 10. Install the motherboard to the phone. 11. Connect the phone to computer, it can be restored by iTunes successfully. 12. Test if it works well. |
The Following 3 Users Say Thank You to Amanda0820 For This Useful Post: |
Bookmarks |
Thread Tools | |
Display Modes | |
| |
|