Question about Nokia N72 Cellular Phone

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Mother board short shurcute

Due to water gon into the mobile after wards only white light displaying after shown some body they told mother board has to be change

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Nokia72 mather board short shurcute please halp me.

Posted on Mar 09, 2010

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Display problem due to track break in mother board


First rule: Never handle ANY electronic devices WITHOUT
wearing your (ESD) anti-static wrist-straps... EVER!

It could be more damaging than a cesspool would ever hope.

If you are not adverse to purchasing from eBay: China sources there (free shipping) sell cases, screens batteries up-to whole un-locked GSM phones for under $20...

Having no personal knowledge of the NOKIA 2700 motherboard... I am just assuming that it is a multi-layered board (not actually suited to solder/trace repair.

I believe board replacement would be cheaper... and since I am seeing NEW PRODUCTS (with free shipping from China... my opinion (with extensive back-ground in water-recovery of electronic devices... ...Minutes & hours is possible IF ALL POWER IS IMMEDIATELY REMOVED... immediately field stripped into smallest components, contaminants removed (washed)...
Then DEHYDRATED for DAYS... you MIGHT have something worth saving...

but...

Untreated for Days... and as you said "WEEKS" you are assured to have corrosion, electrolysis & galvanic tinseling on the PCBs alone...
Connectors, batteries, switches, jacks and $4 displays are simply not worth the effort...

Whole-phones on eBay.

Sorry.

If you think you want to TRY to save your SIM Card...
wipe it completely clean with a 90% isopropyl MOISTENED (only: soft/clean) cloth. Take a SOFT (graphite) pencil and gently (smoothly) draw on each contact completely.

Repeat the 90% isopropyl MOISTENED (only: clean) cloth wipe down and let it dry.

Take a clean toothpick and put a (NEARLY invisible) SPECK of white lithium grease on each SIM contact...

Wipe it all off with a clean cloth... You are now free to TRY to use your OLD SIM card under your new contacts (keeping in mind that SIM has been WELL beyond any/all design considerations... and can damage its NEW host)... I'm just saying.

Good luck.

nokia 2700

Apr 13, 2016 | Nokia Cell Phones

1 Answer

Batteries and phone very hot


There is a short in the phone that causes a high rate of battery discharge resulting in a overheating battery.
This cell phone is faulty and I suggest you get a new cell phone.

May 21, 2013 | Nokia 5130 Cell Phones

1 Answer

Nokia 2100 dead werno po


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 doesn't go it may be due to shorting in an ic,capacitor 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 becomes 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 :D:D

Jul 18, 2011 | Nokia 2100 Cellular Phone

1 Answer

I have htc p3400. i replaced the battery but my phone is not turning on. no indication that the battery is charging. (no orange light). when i switch on the charger, only once the light (red & green...


PHONE IS DEAD WON'T COME ON
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 doesn't go it may be due to shorting in an ic,capacitor 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 becomes 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 :D:D

Jun 17, 2011 | Cell Phones

1 Answer

My e63 is not turning on


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 doesn't go it may be due to shorting in an ic,capacitor 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 becomes 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 :D:D

Jun 15, 2011 | Cell Phones

1 Answer

My phone does not come on.


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 doesn't go it may be due to shorting in an ic,capacitor 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 becomes 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 :D:D

Jun 13, 2011 | Ericsson Cell Phones

1 Answer

Bad response from mobile repair center


hai.friend .display problem might been solved by changing strip.

May 13, 2010 | Samsung J700 Cellular Phone

1 Answer

Navigation and back keys are working wrong


you can take the battery and the back off the device and place in completely submerged in a bag of white rice and leave it in there for 1 to 2 days this will help absorb the moisture, this should fix it if the water did not damage the circut boards if the water damaged the circut boards then the device is fried

May 11, 2009 | Sony Ericsson W700i Cellular Phone

1 Answer

My screen is all white


* there is one connecter which connects the display to mother board, sometimes its flat plastic cable which is used.
* there looks like a disconnection between two.
* if you can open your mobile, just open and fit it as it is. Then it should work.
* ifyou are not confident then go to mobile technician nearby you.

Mar 27, 2009 | Cell Phones

7 Answers

HELP! I CAN"T SEE THE DISPLAY ON MY PHONE


Dear u open ur mobile and reconnect the lcd connector to mother board. if still prob u neeed to repalce ur LCD.

Jun 05, 2006 | Samsung SCH-a650

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