Mobile Phone Parts Identification | How to Identify Parts & Components on PCB of Mobile Phone

Santosh Das

Santosh Das is an Engineer, Blogger, Young Entrepreneur and Founder of this Mobile Phone Repairing Website. Santosh possesses vast experience in the field of electronics, telecommunication, Soldering, SMT, ESD Safety, and electronics manufacturing tools, equipment and consumables. Santosh left his job in 2014 and started his own Private Limited Company that deals and supplies PCB Assembly and Rework Tools, Equipment and Consumables. Keep visiting for daily dose of Tips and Tutorials.

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115 Responses

  1. Rehan khan says:


  2. Shreyans Barthwal says:

    My Oneplus 5 Device is facing Screen Freeze issue from last few months which gets temporary resolved after multiple reboots , sometime single reboot sometime it didn’t wakes up for 2 days. Now after fighting this battle for months my phone is dead. Display works, everything in the phone works (can see notifications getting recieved , battery getting charged, Network reception on place), just my screen doesn’t respond to my touch. As discussed with Oneplus service center , it is a manufacturing defect in motherboard which is faced by many user who have replaced there motherboard during warranty but i started facing it after my warranty expired.

    Now i want to know which component in motherboard can cause this issue where everything is working in background , display is working but screen is not responding to touch.

    • Santosh Das says:

      The Phone Display is Made up or 2 Parts – Main Display and Touchscreen. Both are 2 Different Parts. You may have to Just Replace the Touchscreen not the Main Display.

  3. Lancer says:

    Hi Santosh sir you blog is very informative and helpful for all mobile repair engineer.
    Can you pls explain mobile power sequence from vbus to vbat to all section.This will be very helpful for Dead mobile repair…

  4. Mohamad Jihad Ziab says:

    Hi, Could the IC be damaged if the mobile felt on ground and screen damaged?

  5. Taika james says:

    My phone faile to switch on what should i do?

  6. Goutam says:

    sir how to identification to all IC

  7. Steven says:

    hi sir, my charging current is unstable and sometimes wont charge at all shows at 0mah is it charging ic? cause i tried several plugs and cable the result still the same


    hello sir … are you provinding any mobile reparing courses

  9. K. BOADI says:

    My Samsung A3 2016 has gone off. With the charger plugged in u can on it. It goes off as plug the charger out. I’ve replace several batteries still the same, batt is abt 3.94v. It can charge the battery to 100% but goes off as u remove the charger.
    What do I do??? Pls help, thank U

  10. Santosh Das says:

    Reset the Phone and Check. You can also try to check the SIM Connector with Petrol or alcohol and Check again.

  11. Akshay says:

    Hello sir, my micromax unite 2 is dead.. capacitor and diodes are in ok voltage range..what the other possible problem in it..??

  12. Dympna Mahoney says:

    I have dismantled an old Nokia, are any of the parts dangerous to handle or otherwise. I intend to use them as part of an art project.

  13. rihan raza says:

    I have checked sir but not work any other ideai sir

  14. rihan raza says:

    Sir i have note 1 samsung
    When i put to charge it apear CHARGING PAUSED BATTRY TEMRETURE TOO LOW i wil change charging full set but not repair i changed battry also but not repair i did reset but not work what can do sir pleas give any ideai

  15. Joseph Angmor says:

    Sir my Samsung galaxyJ7 went off immediately i plugin faulty charger, what should i do,?

  16. Lopar says:

    Thank you for this share, I have Sony Z3 compact and it is not charging anyomore. Now I can identify Charging IC and repair it.
    Best regards,

  17. ishwar says:

    Sir mobile me lagnne wake component me baste me baton

  18. vijaybadave says:

    plz send Mobile repair course in PDF

  19. BEAM says:

    Hello team!
    Please can anybody support here? I am looking for the catalog of spare part for smartphones? like image+name of the part. FPC, giftbox, PCBA, EVA GB….


  20. jagadish says:

    hello sir I have multi mobile but not comming tower what is probalm

  21. Fasil says:

    Which is the component(ic) responcible for charging of smartphone in it’s motherboard

  22. SAKTHIVEL says:

    Zen admire glam software problem

  23. munzer says:

    Lgk520dy it say no service both sim i change the software but not solve my problem i cheque my imei its correct please give me a solution to this problem

  24. clement says:

    yes sir i have nokia lumia 635 but the flight mode cannot turn off and i have flash the phone still not working. i need help to locate the flight mode ic so that i can remove it by myself please help me out

  25. richard antony says:

    its not working fakee…

  26. Aashay says:

    Iphone 6 no service or searching problem. Tried everything from updating to resetting network settings.

  27. Shane Torresan says:

    Hello I’ve had a problem with my Xperia Z3 where I get a poor LTE signal and constant loss of GPS during use of Google maps now that I got the phone apart to fix the screen will swapping out the PCB board fix this problem?

    • Santosh Das says:

      This is problem of the phone. You cannot do much. Update the Software and check.

      • Shane Torresan says:

        Don’t think it’s a software issue but if any thing I could try flashing a different firmware as there is no more updates for this phone it’s a Rogers phone from the east coast and I’m a Fido customer on the west coast basically the same network so I don’t know it could be a problem in the motherboard with one of the components and yes if so there’s not really a fix

  28. shambhu ghimire says:

    where i can bye PFO: Power Frequency Oscillator ic for Mi4c mobile.

  29. amit says:

    Sir smartphone ka HDMI part hai ya nhi.?

  30. omparkash says:

    how i idendify ram any part number no for 2 gb or 3gb ram

  31. Saurabh Sharma says:

    sir PCB bord mobile ka kav aya tha or kisne iski khoj ki thi

  32. Mohamed Imran. Srilanka. says:

    Hai Sir…
    I just saw your lectures today, There were many clarifications, They are satisfied with me.

    Are there any clarifications about new Android motherboards? Eg: SAMSUNG A3, J7, NOTE 5.

  33. sahil says:

    nice sir sorting nahi ja rahi 750 aa rhy hai samsung ka b313 hai mobile aur na hi on ho raha hai kya kru

  34. Deepak says:

    Thank you so much santosh your really helped me.

  35. lalji says:

    wow all basic guid for mobile repairing is availble hear

    keep it up

  36. santhoshkumar says:

    Hi Das ,

    this is santhoshkumar i have blackberry 8520 curve it is not working now i don’t what is problem will you please help me

  37. V.R. Tuladhar says:

    Dear Das.

    Many many thanks for your fruitful complete guidance towards the repairing of different kinds of mobiles. I found very simple and easy to understand all the componetns included in the mobile set. Thanks for sharing your valuable knowledge. Keep it up!

  38. Julius says:

    Tanks alot ur infor is gud

  39. Sreenivas says:

    This site so useful to me

  40. umesh kumar says:

    thanks for guidance
    very helpfull site
    for mobile repairing
    thankyou so… much

  41. M Rahman Moti says:

    Thank you

  42. Anderson Malangizo says:

    Thanks for your help, I learn more about phone repair now and am very happy, am looking forward to hear from you any information

  43. yuba says:

    am very interesting to learn how to repair phones

  44. Baldeep says:

    Sir muje smart phone ki pcb dek ne ke liya kya krna hoga

  45. Nagaraj says:

    Dear sir, M Nagaraj from karnataka! Sir, i learned mobile repaire course recently, i will open mobile service shop! How to prepare give tips?

  46. vivek says:

    Sir pls muze koi mobile repair ki hindi pdf file send kro…. iam waiting

  47. Iqbal Sharma says:

    Dear sir,
    God bless u, I learn alot about various parts of cell phone, its quite interesting nd exciting to know about chip level work.
    I wants to quinch my threst of knowledge kindly send more things like that.

  48. Haribabu says:

    Important to learn about this thanks

  49. ashwani tyagi (india) says:

    please any information share with me


  50. Ermias Estifanos says:


  51. Faizan says:

    Sir you are awesome i am your big fan sir thank you so much for your notes about mobiles and repairing all are awesome and i am an electronics engineer and i know it is fantastics and all notes about parts and pcbs are very good…
    If want please give me a chance to work with you,in your company..

  52. Ato willie says:

    The lesson is very interesting Good day

  53. pushpraj says:

    Improve my confidence

  54. zaza says:

    Thank you very much for your service.
    I got phone repair knowledge from you.Later I will learn and visite to your site.

  55. bhanu teja says:

    nice informaction

  56. manjunath says:

    I have done course in handset repair problem is where I can get valuable certification exam which exam I can write

  57. silviu says:

    all good but how to know what big pcb part I’ have to change ,how to testing big part with multimeter ???%

  58. dev says:

    Really I do appreciate your hard work in preparing the notes from beginning to end, for mobile repairing. Thanks a lot..
    I have one question, from where do we get track diagrams of different model?

    • Santosh Das says:

      Tracks of different models are available in the market. You need to find them in stores that sell mobile phone accessories and tools.

  59. bikash singh says:

    no services message on screen

  60. bikash singh says:

    LG P350 network not working
    plz help me

    • Santosh Das says:

      RESET The phone to fix the problem. Change the SIM and Check. If none of the 2 tips solve the problem then take the phone to service center.

  61. veeru says:

    keep it up friend .really very thanks to u my friend

  62. RAFIKBHAI says:

    Hi Its very good thank for Sharing its very helpfull i hope you update more info thank

  63. Nana Kwame says:

    Your site is wow b’cos you are impacting a lot about mobile cell phone not to me alone but to the world.May all the crew get more than understanding to continue teaching,blessed.

  64. Dheivendran says:

    Thank u sir and same publishing laptop services

  65. Yogendra singh says:

    Thanks sir ur side is best.i hope always you help me thanx alots

  66. zahid says:

    this is very good site , i m new in this field i m learner i found its very very useful 100 % thax sir
    i hope i will get more help from you to learn this

  67. kARTHICK PRASAD says:

    Its really nice and easy for understanding. From now onwards i follow your site, if i feel any doubt in mobile servicing. Thanks for your support.

  68. Sappor Joshua says:

    God will bless you for help us .thanks

  69. Jose says:

    Excellent work guys, Really helpfull Thanx

  70. Sanjay says:

    Information’s provided by you is very very useful.
    I have one issue.
    I have given my Sony xPreia st23 (Miro) for repairing as theer was some water droplets inside.
    Technician told me that LCD terminals have gone and he proposed for LCD replacement.
    But after so many days he is not able to find right connection for backlight.
    Aleady he is able to see SONY logo but display not appearing even with a new LCD.
    Could you please guide with some pic or sketch how to fix the issue.


  71. mene says:

    sir, your tutorial is 100 percent useful and helpful please keep it up.expecting more tutorial in advance.

  72. deep jaan says:



  73. luhiga says:

    Hi Sir,
    Thanks alot for time use to prepare the lesson to anyone who interest to learning,how to repair mobile cell phone, and alot you done well.I have appriciate yourjob. God bless you and your family.Iam learning to you .

  74. mr. X says:

    how to check the track for speaker problem for jumpering….where it starts and where it should end

  75. hussain says:

    Thanx Alot This Site is very helpful Keep It Up

  76. wayeso gebeyehu says:

    to be honest i found your lesson so amazing and teaching. keep it up

  77. Darlington says:

    Hi God bless you so much, you’ve really changed and shaped my destiny through this tutorials

  78. sadiq says:

    very nice.I am a beginner in mobile servicing field.Your contents are very easily understandable.Thaaanks a lot…………

  79. Dagnachew says:

    It is good Keep it up!!!

  80. All about mobile phone life says:

    Hello very cool site!! Guy .. Beautiful .. Wonderful .. I will bookmark your site and take the feeds also?I’m glad to search out numerous helpful information here in the submit, we need develop more strategies in this regard, thanks for sharing. . . . . .

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