iphone se 2020 restarting line missing problem/ se 2020 restarting line missing problem solution скачать в хорошем качестве

iphone se 2020 restarting line missing problem/ se 2020 restarting line missing problem solution

iPhone SE 2020 restarting line missing,” you’re most likely referring to a power line or signal trace responsible for system startup or stability, which has been damaged, missing, or open — often after water damage, short repair, or PMIC work. Let’s go through this step by step 👇 ⚙️ 1. Understanding the “Restarting Line” The iPhone SE 2020 (A2296 / A2275) uses the A13 Bionic SoC, same as iPhone 11. If the phone keeps restarting, boot-looping, or stuck on Apple logo, the cause can be: Cause Description PP1V8_SDRAM, PP_CPU, or PP_GPU missing Key power rails not stable → reboot loop PMU to CPU reset line (PMU_PMIC_RESET_L) broken CPU never exits reset state SENSE / feedback line from PMIC missing Power controller can’t regulate voltage correctly Baseband or Wi-Fi communication line fault Causes kernel panic and reboot loop 🔹 2. Common Restart Lines Involved Line Name Function Source / Destination PMU_PMIC_RESET_L PMIC reset output to CPU U8100 (PMIC) → A13 CPU PP_VDD_MAIN_SENSE / FB lines Feedback from power rails Various power ICs to PMIC PMU_TO_TRISTAR_ALERT / I2C_MAIN_SDA/SCL USB/charging communication U3300 ↔ PMIC BB_RESET_L Baseband reset PMIC ↔ Baseband CPU If one of these is missing or open, the logic board will draw current, start to boot, and then restart every few seconds. 🔍 3. How to Identify Which Line Is Missing You’ll need to: Inspect under microscope — look for torn pads near PMIC (U8100), Tristar (U3300), or baseband area. Check voltage rails: PP_VDD_MAIN → 3.8 V PP1V8_SDRAM → 1.8 V PP_CPU → ~0.9 V (appears briefly during boot) PMU_PMIC_RESET_L → 1.8 V stable (if missing = continuous restarts) If one of these is 0 V or fluctuating → the corresponding trace/line is likely open or missing. 🧰 4. Professional Repair Path If the reset line pad is missing, here’s what a board-level technician does: Locate alternate test point or via from schematic/boardview (for PMU_PMIC_RESET_L or other missing line). Expose copper on that via, solder a 0.01 mm jumper wire to reconnect the line. Secure jumper with UV mask and reassemble board. ⚠️ 5. Common Locations of “Restarting Line” Damage on SE 2020 Area Likely Reason Near PMIC (U8100) Overheat or reball damage breaks RESET_L pad Under CPU corner Excess heat during reflow warps CPU line Under Tristar (U3300) Shorted USB data → feedback line missing Near Battery connector (J4500) Corrosion breaks SYS_RESET or PP_BATT_VCC path 🎥 If you want style-specific packs: 🔵 Short & clean (for minimal look) #iPhoneSE2020 #BootLoop #iPhoneFix #TechHelp 🟥 High-search YouTube Tech Repair pack #iPhoneSE #SE2020Problem #iPhoneRestartLoop #BootLoopFix #iPhoneRepair #FixiPhone #TechTutorial #HowToFix #AppleDevice 🟢 Long SEO version (boost discovery) #iPhoneSE2020 #iPhoneSE #iPhoneRestarting #iPhoneBootLoop #BootLoopFix #AutoRestartIssue #iPhoneRepair #AppleRepair #iPhoneTroubleshooting #TechHelp #TechTutorial #MobileRepair #PhoneFix #SmartphoneIssues #FixiPhone2025 #AppleFixGuide