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 > Nokia > Nokia Hardware & Hardware Repair

Nokia Hardware & Hardware Repair all what you need for Hardware Repairing for Nokia Phones. Before writing any thread here try to check the Frequently Asked Questions Section.

Reply
 
LinkBack Thread Tools Display Modes
Old 01-10-2010, 18:49   #1 (permalink)
Freak Poster
 
Join Date: Aug 2009
Posts: 387
Member: 1102317
Status: Offline
Thanks Meter: 180
Thumbs up 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 4 Users Say Thank You to akram855 For This Useful Post:
Show/Hide list of the thanked
Old 01-10-2010, 22:19   #2 (permalink)
No Life Poster
 
chohansahib's Avatar
 
Join Date: Mar 2008
Location: Uk (Birmingham)
Posts: 1,093
Member: 719944
Status: Offline
Thanks Meter: 2,117
thanxxxxxx for info for new engineers .........
  Reply With Quote
Old 01-11-2010, 03:28   #3 (permalink)
No Life Poster
 
chetanmaturkar7's Avatar
 
Join Date: Mar 2009
Posts: 753
Member: 986394
Status: Offline
Thanks Meter: 168
very very nice solution.keep it up............................................
  Reply With Quote
Old 01-11-2010, 13:16   #4 (permalink)
Insane Poster
 
Join Date: Nov 2008
Location: cuttack,orissa
Age: 39
Posts: 74
Member: 891893
Status: Offline
Thanks Meter: 24
Arrow Congratulation

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
Many many thanks for the post
  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 On
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 Mobile Phone akram855 Various CDMA/TDMA Cell Phones 21 08-16-2016 12:01
@@@...How To Repair A Dead China Phone by [email protected]@@ mobi_soft Chinese Models & Cloned Phones 7 07-21-2014 08:51
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 12:46

 



All times are GMT +1. The time now is 17:13.



Powered by Searchlight © 2020 Axivo Inc.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
- GSM Hosting Ltd. - 1999-2017 -
Page generated in 0.28344 seconds with 8 queries

SEO by vBSEO