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Various CDMA/TDMA Cell Phones All CDMA & TDMA Cell Phones Related Threads are here |
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01-10-2010, 20:04 | #1 (permalink) |
Freak Poster Join Date: Aug 2009
Posts: 387
Member: 1102317 Status: Offline Thanks Meter: 180 | How to Repair a Dead Mobile Phone 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 |
The Following 2 Users Say Thank You to akram855 For This Useful Post: |
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. |
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:
but relly good work akram ji for mobile hardware knowlagde thanks Hariom | |
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 | Quote:
good job bro. | |
The Following User Says Thank You to ssamji For This Useful Post: |
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 |
01-16-2010, 23:26 | #7 (permalink) | |
Freak Poster Join Date: May 2008
Posts: 168
Member: 769590 Status: Offline Thanks Meter: 16 | Quote:
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. | |
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 |
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] |
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] |
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] |
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