GSM Shop GSM Shop
GSM-Forum  

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 .

Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Various > Various CDMA/TDMA Cell Phones

Various CDMA/TDMA Cell Phones All CDMA & TDMA Cell Phones Related Threads are here

Reply
 
LinkBack Thread Tools Display Modes
Old 01-10-2010, 20:04   #1 (permalink)
Freak Poster
 
Join Date: Aug 2009
Posts: 387
Member: 1102317
Status: Offline
Thanks Meter: 180
Arrow How to Repair a Dead Mobile Phone


If the mobile phone does not switch on, it is called a dead mobile.
It can be due to many reasons
1. Water damage
2. Fall down
3. Not used for a long time ( Mostly battery is down)


(1) Check the Battery. It should show 3.7 volts or as written on the battery.

(2) Check the Battery Connector
Check two things (a) Voltage coming or not (b) shorting
Note : If there is shorting then clean the circuit in ultrasonic cleaner (Remove display, camera, etc before putting it in ultrasonic cleaner )
Clean the circuit with a soft brush and make it dry with a hair dryer or ****er.
If the shorting does'nt go it may be due to shorting in an ic,capaicitor or circuit. if shorting is in ic u can check it by attaching a battery then press the on-off switch keep the battery for 10-15 seconds. after that remove the battery and check which ic bacomes hot. Reball or replace that ic. If shorting is in circuit it must be removed by ultrasonic cleaner
Note - The circuit is made of three layers. if there is shorting in the middle layer it cannot be removed
(3) Check the On/Off switch & voltage at on-off switch
Note - Connect a charger. If charging is shown on display then the problem is with the on/off switch or software problem

(4) Try flashing the mobile.

(5) If flashing cannot be done then there is hardware fault we first dry solder the Flash IC & RAM IC and check in the Software. if flashing cannot be done then we dry solder/reball/replace flash ic & RAM ic.After that dry solder/reball/replace Power IC, Network IC, Crystal, CPU
  Reply With Quote
The Following 2 Users Say Thank You to akram855 For This Useful Post:
Old 01-11-2010, 04:12   #2 (permalink)
No Life Poster
 
Join Date: May 2006
Location: lucknow
Posts: 1,123
Member: 275643
Status: Offline
Thanks Meter: 360
good explanation dear akram,since i'm only do software my hardware knowledge is nill, but u give here hardware in such a simple way some techniques about dead set alive i really appreciate ur work.
  Reply With Quote
Old 01-11-2010, 18:18   #3 (permalink)
Registered User
 
Join Date: Jul 2008
Location: (India)
Age: 41
Posts: 749
Member: 804452
Status: Offline
Thanks Meter: 249
Quote:
Originally Posted by compue View Post
good explanation dear akram,since i'm only do software my hardware knowledge is nill, but u give here hardware in such a simple way some techniques about dead set alive i really appreciate ur work.
sir ji aap se ye nahi pucha ki aap kya karte ho (Hardware ya Software)

but relly good work akram ji for mobile hardware knowlagde thanks


Hariom
  Reply With Quote
Old 01-12-2010, 03:47   #4 (permalink)
Junior Member
 
Join Date: Jul 2008
Posts: 15
Member: 819022
Status: Offline
Thanks Meter: 2
sir kya app mujhe bata sakte hain kisi phone me number kaise dalte hain jaise reliance or tata me dalte hain , phir hame phone me sim card dalne ki jarrorat nahi hoti.
  Reply With Quote
Old 01-16-2010, 10:13   #5 (permalink)
Registered User
 
Join Date: Jan 2008
Location: on gsm heart
Age: 36
Posts: 308
Member: 685523
Status: Offline
Sonork: 100.1603487
Thanks Meter: 381
Thumbs up

Quote:
Originally Posted by akram855 View Post
If the mobile phone does not switch on, it is called a dead mobile.
It can be due to many reasons
1. Water damage
2. Fall down
3. Not used for a long time ( Mostly battery is down)


(1) Check the Battery. It should show 3.7 volts or as written on the battery.

(2) Check the Battery Connector
Check two things (a) Voltage coming or not (b) shorting
Note : If there is shorting then clean the circuit in ultrasonic cleaner (Remove display, camera, etc before putting it in ultrasonic cleaner )
Clean the circuit with a soft brush and make it dry with a hair dryer or ****er.
If the shorting does'nt go it may be due to shorting in an ic,capaicitor or circuit. if shorting is in ic u can check it by attaching a battery then press the on-off switch keep the battery for 10-15 seconds. after that remove the battery and check which ic bacomes hot. Reball or replace that ic. If shorting is in circuit it must be removed by ultrasonic cleaner
Note - The circuit is made of three layers. if there is shorting in the middle layer it cannot be removed
(3) Check the On/Off switch & voltage at on-off switch
Note - Connect a charger. If charging is shown on display then the problem is with the on/off switch or software problem

(4) Try flashing the mobile.

(5) If flashing cannot be done then there is hardware fault we first dry solder the Flash IC & RAM IC and check in the Software. if flashing cannot be done then we dry solder/reball/replace flash ic & RAM ic.After that dry solder/reball/replace Power IC, Network IC, Crystal, CPU


good job bro.
  Reply With Quote
The Following User Says Thank You to ssamji For This Useful Post:
Old 01-16-2010, 21:52   #6 (permalink)
Junior Member
 
Join Date: Jan 2010
Posts: 1
Member: 1210891
Status: Offline
Thanks Meter: 0
Nice article If you are interested you can visit the www.leelaelectronics.in and browse many ultrasonic cleaners. Not just ultra sonic pcb cleaners but you will find many types of ultrasonic cleaners like table top cleaners , larger ultrasonic & other applications
  Reply With Quote
Old 01-16-2010, 23:26   #7 (permalink)
Freak Poster
 
Join Date: May 2008
Posts: 168
Member: 769590
Status: Offline
Thanks Meter: 16
Quote:
Originally Posted by akram855 View Post
If the mobile phone does not switch on, it is called a dead mobile.
It can be due to many reasons
1. Water damage
2. Fall down
3. Not used for a long time ( Mostly battery is down)
reading this im sure you missed a point . . .
Quote:
Originally Posted by akram855 View Post

(4) Try flashing the mobile.
then after reading this i see that you have not missed a point.... though in bad order, your are not going to fix a water or fall damaged phone by flashing it unless lady luck is on your side

If no visable fall of water damage is seen at first inspection i would connect the phone to some tools and see what readings i can get from the phone (you never know which smart a$$ has had the phone in hands before yourself) if any, if it is completly dead..... then i would check the battery, then for fall and water damage. Though nice contribution.
  Reply With Quote
Old 01-04-2011, 16:13   #8 (permalink)
Freak Poster
 
Join Date: Feb 2008
Location: india
Posts: 150
Member: 712150
Status: Offline
Thanks Meter: 31
plz tell me how can replace ic such as power. pfo, cpu, key pad, light etc
  Reply With Quote
Old 01-05-2011, 09:42   #9 (permalink)
No Life Poster
 
MOHIT_THAREJA's Avatar
 
Join Date: Oct 2009
Location: India [UNKNOWN]
Posts: 3,257
Member: 1143809
Status: Offline
Sonork: 100.1602432
Thanks Meter: 574
Donate money to this user
nice information .................
  Reply With Quote
Old 03-21-2012, 12:51   #10 (permalink)
Junior Member
 
Join Date: Mar 2012
Posts: 4
Member: 1729464
Status: Offline
Thanks Meter: 0
thank u sir this is a very usefull information for me because i am a undertaining of mobile repairing , sir my sincere request is kindly give me the details of all fault finding procedures, i will be very thankfull to you
  Reply With Quote
Old 09-30-2012, 17:08   #11 (permalink)
Junior Member
 
Join Date: Jun 2012
Posts: 19
Member: 1776585
Status: Offline
Sonork: 12345
Thanks Meter: 0
friend any phone connect power supply unit and press on switch power supply unit indicate 0.03A and short time indicate 0.00A , what is this problem, please help me my email - [email protected]
  Reply With Quote
Old 10-01-2012, 17:42   #12 (permalink)
Junior Member
 
Join Date: Jun 2012
Posts: 19
Member: 1776585
Status: Offline
Sonork: 12345
Thanks Meter: 0
friend any phone connect power supply unit and press on switch power supply unit indicate 0.03A and short time indicate 0.00A ,and no power on phone, what is this problem, please help me my email - [email protected]
  Reply With Quote
Old 08-03-2013, 18:40   #13 (permalink)
Freak Poster
 
AC-GSM971's Avatar
 
Join Date: Nov 2011
Location: GSMHOSTING
Posts: 389
Member: 1691378
Status: Offline
Sonork: 100.1645448
Thanks Meter: 141
Donate money to this user
Quote:
Originally Posted by kanifanath View Post
sir,kisi b mobile k hardware ko change kar sakte hai.
before posting read rules

every post should be in english language only

br
acgsm
  Reply With Quote
Old 04-22-2014, 10:30   #14 (permalink)
Junior Member
 
Join Date: Jan 2014
Location: Kashmir
Posts: 13
Member: 2103288
Status: Offline
Thanks Meter: 0
Help

Sir, how to check whether mobile display is ok r not
  Reply With Quote
Old 04-22-2014, 10:31   #15 (permalink)
Junior Member
 
Join Date: Jan 2014
Location: Kashmir
Posts: 13
Member: 2103288
Status: Offline
Thanks Meter: 0
My email id [email protected]
  Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
thread Thread Starter Forum Replies Last Post
@@@...How To Repair A Dead China Phone by mobi_soft...@@@ mobi_soft Chinese Models & Cloned Phones 7 07-21-2014 08:51
How to Repair a Dead Mobile Phone akram855 Nokia Hardware & Hardware Repair 3 01-11-2010 14:16
How to repair liquid damage mobile phones?? Slick123 Nokia Hardware & Hardware Repair 44 10-01-2007 08:49
How To Repair A Dead Siemens Phone By Using Dreambox?? Eagle7 DreamBox 1 07-21-2006 15:58
GRiffin / GTS BOX How to repair a DEAD PHONE ? mail_man Griffin 4 03-25-2006 13:46

 



All times are GMT +1. The time now is 07:40.



Powered by Searchlight © 2024 Axivo Inc.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
- GSM Hosting Ltd. - 1999-2023 -
Page generated in 0.24279 seconds with 9 queries

SEO by vBSEO