Question about Samsung SGH-c225

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No power, all buttons flash when connected to ac charger

I don't see voltage on battery, checked voltage on batt conn on cell phone with batt removed and ac charger connected I see 2.7v and 4.1 volts (tests done with no simm card)

Tried to open up and clean, still same. Doesn't start, all buttons flash when connected to ac charger.

Pls help, need to retrieve phone book.

Thanks

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  • mcubeu Jul 21, 2008

    Thanks tatonot, it seems that the battery was shot. I connected charger's cable directly to phone batt terminals and got the screen.
    Thanks for guiding me.


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If charger voltage is ok then it could be phones charging controler is not working. if phonebook is only thing you need could recharge battery directly from your charger and then save your phone book. cut off charging plug-connector from your charger make two bare wires and then apply red wire to battery "+" and blck to "-". 5min of charging will be enough to copy your data

Posted on Jul 21, 2008

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My lg phone wont turn on do you have a solution


You haven't mentioned which model of LG phone.

You could try removing the back of the phone and taking out the battery.

Consult your owner manual on how to remove the battery.

Press and hold the power button for 10 seconds.

Leave the battery out for half an hour.

Replace the battery and plug in the charger.

Leave it for five minutes and then try to turn it on again.

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To locate the problem, it's important you own a multimeter, which can read DC Voltage and resistance.

If you do own one, then you can perform the following :

1. Battery
Set your multimeter in Voltage (DC)-mode.
Remove the battery from your phone and see what Voltage it's rated. (might be something like 3.7V, 4.2V or even higher.

The phone contains a minimum of 2 (small) pins, which is touching the battery, when it was inserted. The battery will have 2 or move gold-alike pads.Try to measure the battery at these pads to see the Voltage. If there are more pins, don't worry, just try to measure between all pins.
If the readout at your multimeter is roughly 0.5 Volts below the rated Voltage, the battery should be replaced.


Example :
Battery rated 3.7 V. Readout multimeter : 3.2 V
Battery should be replaced.

2. Adapter / charger
Insert the adapter in a wall-outlet (110 / 240 V AC)
The adapter, contains a plug, which inserts into your mobile phone. At this plug, you need the Voltage. The readout at your multimeter should be a higher than the Voltage-rating at he battery. If not, your adapter / charger is damaged.

3. Onboard connection
Set your multimeter in Resistance-mode, sometimes also shown as the Ohm-sign.
When charging your phone, your adapter is connected to your phone, redirected to the battery. Now it's time to check if there's a good connection between the phone-inlet and the battery-pins inside your phone. The inlet has in the center a metal pin. Try to connect your multimeter to this pin, and one of the battery-pins inside your phone. If there's no connection, to any of these pins, you'll get no readout. This might mean, the phone-inletconnector is not well connected to the board(*) of your phone.
(*) The green print, with all tiny electronic components.

The source of this damage might be :

A) While charging, the phone dropped on the floor.

B) Non-official adapter / charger
Maybe a higher rated current than allowed. A battery may be charged 1 / 10th of the specificated current. So, if the battery shows 1600 mAh, the batttery can be safely charged at a current of 160 mAh. If you use a 2A (= 2000 mA) charger, you can charge the battery, but results in a shorter lifetime of the battery.
Sometimes, even polarity might be an issue (reversed) or the non-official charger is supplying AC-Voltage instead of DC-Voltage.

C) Damaged onboard controller
Some phones contain a kind of controller-IC to control the charging proces. If the charger was supplying a too high Voltage or current (Ampere), it might end up in a fried controller-IC.
I such case you might have heard a "plop" when inserting this charger into your phone, or noticed smoke or a distinctive smell (of burned components)

Any repair for type A, B or C-damage, requires special skills and tools. If you lack any of these 2, go for a repair-shop or buy a new mobile phone.

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3. Battery metal probes are not clean: clean them
4. Battery is dead and needs replacement. You can check this is you remove the battery and put the charger on the phone. If the phone boots, it was battery's fault.
5. Phone needs opening and checking of the circuit boards. Possibly a component is broken there. If not, the damage is not visible and need to change the board or the phone.





If this solution helped you, take a minute to rate me.



Thnx.

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PHONE IS DEAD WON'T COME ON
If the mobile phone does not switch on, it is called a dead mobile.
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2. Fall down
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(1) Check the Battery. It should show 3.7 volts or as written on the battery.

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Check two things (a) Voltage coming or not (b) shorting
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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.

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as i think that charger was not compatible to your phone so when you tried charging it the battery is dead bcoz of excess voltage than it normally bears with the compatible charger of ur phone ...
so this excess voltage has made the battery to be short circuited due to this may be the charging ic or the capacitor is gone ...
so i suggest you to take the cell to the near by technician and just have a check...

the only problem with all motorola phones is that it only charges with the charger with the desired voltage ... if the voltage of the charger is low then it will not show any response(i mean it will not charge but it will not cause any thing to battery as it is of less voltage than the desired voltage )
so i think the charger you buyed provides more than the desired voltage so the battery is dead .....

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