Mobile Auto Restart Problem Solution: Hang on Logo & Boot Loop Fix | Lesson 42

Team Tekno World ke free mobile repairing course mein aapka swagat hai! Main hoon Rakesh Chauhan, aur yeh humara Lesson 42 hai.

Aaj hum us fault par baat karenge jo technicians ko sabse zyada confuse karta hai— Mobile Auto Restart Problem Solution aur Hang on Logo.

Grahak kehta hai “Phone logo par atak gaya hai”.

Ab sawaal yeh hai: Humein Computer lagana hai (Flash) ya Hot Gun uthani hai (Reball)?

Agar aapne Hardware fault wale phone ko Flash kiya, toh wo Dead ho sakta hai (e.g., eMMC Health issue). Aur agar Software fault par Reballing kar di, toh aapki mehnat bekaar.

Aaj hum Watchdog Timer aur Boot Sequence ke logic se “Exact Fault” pakdenge.

Step 1: The “Watchdog Timer” Logic (Kyun hota hai Restart?)

Technicians sochte hain Restart ek bimari hai. Galat!

Restart ek Safety Feature hai.

CPU ke andar ek system hota hai jise “Watchdog Timer” kehte hain. Jab aap phone ON karte hain, Watchdog check karta hai:

1. Kya saare voltages (Buck/LDO) ban rahe hain?
2. Kya RAM aur Storage jawaab de rahe hain?
3. Kya Temperature normal hai?

Agar CPU ko kisi bhi stage par gadbad milti hai, toh Watchdog turant system ko Reset (Restart) kar deta hai taaki phone blast hone ya short hone se bache.

Isliye, Restart ka matlab hai—CPU abhi zinda hai aur safety check kar raha hai.

Step 2: The “Thermal & ID” Check (Sabse Common Fault)

CPU sabse pehle Battery ko check karta hai.

• Battery ID / BSI: Agar Battery Connector ki beech wali pin (ID) par resistance galat hai, toh CPU battery ko pehchan nahi payega aur phone band kar dega.
• Thermal Thermistor (THM): Phone mein 2-3 Thermistors (Resistors) hote hain jo heat sense karte hain.
  • Agar ye resistor kharab ho gaya (Open/Short), toh CPU ko lagega phone aag mein hai (-40°C ya +80°C error) aur wo turant restart marega.
  • Test: Battery connector aur Power key ke paas ke chhote resistors check karein.

Step 3: DC Machine Reading (Decoding the Ampere)

DC Machine ki reading aapko bata sakti hai ki fault Software (OS) mein hai ya Hardware (IC) mein.

Scenario A: Hardware Boot Loop (Rhythmic)

• Reading: 0.00 -> 0.18 -> 0.22 -> 0.00 (Drop) -> Repeat.
• Analysis: Agar sui baar-baar Zero par gir rahi hai, iska matlab CPU boot hone ki koshish karta hai par koi Hardware (RAM/Buck Coil) fail ho raha hai aur Watchdog reset maar raha hai.
• Solution: Yeh Hardware Fault hai (Double Decker CPU Reballing ya Power IC fault). Software na karein.

Scenario B: Software Stuck (Fluctuation)

• Reading: 0.00 -> 0.20 -> 0.60 -> 1.10 -> Stuck at 0.40 or Fluctuate.
• Analysis: Ampere badh gaya hai, zero nahi ho raha, lekin phone logo par atka hai. Iska matlab Hardware ne pass kar diya hai, lekin Android OS (Software) load nahi ho pa raha.
• Solution: Yeh Software Fault hai. Flashing ya Wipe Data try karein.

Step 4: I2C Line Blocking (Peripheral Conflict)

Kabhi-kabhi CPU aur Software dono theek hote hain, lekin koi “Chota Chor” rasta rok raha hota hai.

Phone mein Camera, Fingerprint, aur Sensors I2C Protocol se jude hote hain.

• Trick: Agar phone Logo par atka hai, toh phone kholkar Cameras, Fingerprint strip, aur Sub-board patta hata dein.
• Kai baar ek Short Camera module pure boot process ko rok deta hai (Hang on Logo). Strip nikaalte hi phone ON ho jayega.

Step 5: Recovery Mode Diagnosis (Brahmastra)

Bina khole check karne ka tareeka:

Phone ko Recovery Mode (Volume Up + Power) mein daale.

1. Agar Recovery Mode Stable hai: Phone band nahi ho raha, options dikh rahe hain.
   • Result: Hardware 100% OK hai. Software (OS) corrupt hai. -> Flash kare.
2. Agar Recovery Mode mein bhi Restart ho gaya:
   • Result: Hardware Fault hai (Power Key Short, Battery ID, ya CPU Dry Solder). -> Flash MAT kare.

Step 6: Storage Health (eMMC/UFS Life)

Agar phone Logo par atka hai aur Flash karne par Error aa raha hai, toh ho sakta hai Storage ki Life (Health) khatam ho gayi ho (90% Consumed).

Aise case mein aapko Box (UFI/EasyJTAG) se Health Report check karni padegi (Jo hum Software Course mein seekhenge).

Summary Checklist (Mobile Auto Restart Problem Solution)

1. Visual: Power Key aur Battery ID check karein.
2. Strip Test: Saare cameras aur patte nikaal kar ON kare.
3. DC Reading:
   • Drop to Zero = Hardware (CPU/RAM).
   • Fluctuation/Stuck = Software.
4. Recovery: Agar Recovery stable hai = Software.
5. Conclusion: Diagnosis ke baad hi repair shuru kare.

💡 Aaj Ka Aapka Task – Lesson 42 (Comments & Forum)

1. Practical: Ek chalu phone ka Rear Camera connect karein aur phone ON karte waqt camera connector par halka sa short karein (Carefully). Dekhein phone kaise logo par atak jata hai. (Yeh risk expert supervision mein le).
2. Comment (नीचे): Kya aapne Poco X3 Pro mein Restart problem fix ki hai? Uska solution kya tha? (Battery ya CPU?)
3. Forum: Agar DC reading 0.060 par atak gayi hai, toh yeh EDL Mode hai ya Ram Fault? Charcha karein Forum (forum.teamtw.in) par.

PHASE 1: HARDWARE DIAGNOSIS COMPLETED!

Doston, Aaj humne Mobile Auto Restart Problem Solution ke saath apne Course ka Hardware Section safalta-purvak poora kar liya hai! 🥳

Humne Multimeter pakdne se lekar Shorting nikaalne tak, aur DC Reading se lekar Dead Boot Repair tak sab seekh liya.

Lekin… “Sharir (Hardware) tab tak bejaan hai jab tak usme Aatma (Software) na ho.”

Aaj ke lesson mein humne seekha ki agar diagnosis mein pata chala ki galti Hardware ki nahi balki “Software” ki hai, toh Hot Gun aur Iron kisi kaam ke nahi hain. yaani aaj ke is Mobile Auto Restart Problem Solution lesson ke sath hardware khatam.

Ab waqt aa gaya hai apne tools badalne ka:

👉 Ab haath mein Screwdriver nahi, Mouse hoga.

👉 Ab table par Rosin ka dhuan nahi, Screen par “Flashing Bar” chalegi.

PHASE 2: SOFTWARE MASTER CLASS STARTS

Kya aap taiyar hain Computer ki duniya mein ghusne ke liye?

Agla lesson humara Software Repairing ka pehla kadam hoga.

Next Lesson Preview:

• Mobile Flashing Kya Hai? (Phone mein naya “Jaan” (OS) daalna).
• Kaunsa Tool Kharidein? Market mein bahut confusion hai—Unlock Tool lein, UMT Dongle lein, ya UFI Box? Hum aapke paise bachayenge aur sahi tool batayenge.
• Drivers & Setup: Computer ko kaise taiyar kare?

Toh apni kursi ki peti baandh lijiye, kyunki ab hum Digital Repairing shuru karne wale hain!

🔜 Agla Lesson: Monday se humari Software class start hone wali hai.

“Lesson 43: Mobile Software Repairing Tools – Introduction (Unlock Tool, UMT, UFI – Kya Kharide?)”