Question about Cingular Wireless 8125 Smartphone

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Will not power up on AC or usb adapter

Cingular 8125 will not run on AC or usb adapter. Works ok with charged battery. Have taken the phone apart and get power at the charging port.
What else can I check?

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  • josh_wingler Jan 14, 2009

    i have the same problem. but mine will not power on with a battery either.

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I had the same problem with my 8125, until I saw the posting by: randaleb2002 , I didn't want to cut my power cord but I did have an extra USB cable, I cut the cable in half and striped the red and the black wires, the red is the positive and the black is the ground (negative). I held these to the red and black terminals on the battery for aprox. 3 min. and sure enough when I put the voltage tester on the terminals it read aprox. 3.1Volts and the device powered on I now have the phone charging, and it seems to work great, I also had a battery for the 8125 that I thought was fried I did the process on it however and it to works great,

so thanks to who ever
randaleb2002 is.


Posted on Jan 27, 2009

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If you have an extra charger for the phone remove the end take the exposed copper wires hold them to the positive and negative post's on the battery for about 3 minutes and then plug into the normal charger.
I know this works I did it to my phone last night.

Posted on Jan 21, 2009

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Cingular 8125, dead as a doornail.


u can take a usb cable that not being used by any thing . save the end that plugs in to your computer . the end you would plug in to the device you can cut off and you need to use the red and black wires to jump start the battery so it will charge . on your battery you will see the - and + the black goes to the - and red to + can use electric tape to hold the exposed wire to it and plug the other end in to your computer for about a 5 to 10 mins and then put it in your phone and turn it on and charge it .if didnt work you might have to leave it hocked up to the usb cord on the battery longer what i did to mine and it turns on and works fine now had the same problem battery got to low and dead . so phone was froze and wouldnt start

Jun 12, 2009 | Cingular Wireless 8125 Smartphone

Tip

Just sacrificed an old USB mouse (it had two black wires, one full length...


Your battery has been depleted past a chargable state.  This is a due to a bad design in the phone that doesn't monitor the battery power state well enough.  It actually allows the battery to be taken under the minimum amount needed to recharge the battery. 

You can fix this, but do so at your own risk.

You can simply purchase a new battery, that will work, just been sure not to let it deplete the battery totally anymore.

Now, on to the fix

-Take out the battery.
-Get any usb cable you can find sitting around. (any usb wire will do, an old printer cable, anything with a usb end that can plug into your computer)
-cut one end of the plug off. You need to leave the side on that connects to your computer. Cut off the side that plugs into a device (printer, camera, web cam, etc)
-Strip the rubber off the wire and expose the wires inside.
-Separate the wires from each other. You will only be using the BLACK and RED wires.
-strip the very end of the black and red wires carefully using a wire cutter exposing the metal wire inside the red and black covering.
-Plug in your home made battery charger to your computer. Careful not to touch any exposed metal, as it will give you a small shock.
****WARNING****
DO NOT UNDER ANY CIRCUMSTANCES ALLOW THE RED AND BLACK WIRE TO TOUCH EACH OTHER
****WARNING****

-now carefully hold the black wire to the negative terminal on the battery (it should be noted with a black circle with a - in the middle). Then touch the red wire to the positive terminal (it will be noted with a red circle with a + in the middle).

Hold the 2 wires there for 20 seconds. Then quickly plug the battery back into the phone, and then plug it into a regular charger. Give it little bit of time, if you've done everything correctly the charge light should come on.

I had to repeat the last step again to get the light to turn on indicating it was charging.

You must not hold the wires to the battery for too long, 20 seconds should do it. You can overload a battery with this trick and actually make it explode if you hold it there too long. You are well within the few minutes needed to detonate the battery due to overcharging by sticking very strictly to 20 seconds.

Just be careful and you'll be fine.

One you get a charge light give it a few minutes in the off position, then try powering up the device and keep it plugged in until you get 100% charge.

Good luck,

Peter




on Oct 15, 2009 | Cingular Wireless 8125 Smartphone

1 Answer

The screen on my cingular 8125 is white.


open the phone (radioshack sells the tiny screwdrivers) and, reseat the video screen connector that came loose

Jun 01, 2009 | Cingular Wireless 8125 Smartphone

1 Answer

Need to replace small battery on main board for cingular 8125


there is a guy that repairs cellphones in Maryland call him and he can fix it for you and send back. i don't know what he will charge you will have to ask him. his # is !-240-595-7669

Jan 07, 2009 | Cingular Wireless 8125 Smartphone

1 Answer

Cracked touch screen for cingular 8125


If you have the right tools and are used to repairing small components it should be doable. there is a fragile flex cable that has to be navigated around thoough. if you not comfortable with that you can contact www.fixphonenow.com , the charge for that repair is $75 and turnaround time is about 1 day.

Nov 16, 2008 | Cingular Wireless 8125 Smartphone

1 Answer

8125


www.fixphonenow.com can provide the unlock code for that phone for $35.

Sep 09, 2008 | Cingular Wireless 8125 Smartphone

2 Answers

HTC 8125


you have to contact T-mobile technical support and have them guide you through programming their internet settings on the phone. although the phone is unlocked the internet settings currently on the phone is for cingular. have them program the same settings as the t-mobile MDA phone (same phone as 8125, shipped for t-mobile)

Aug 20, 2008 | Cingular Wireless 8125 Smartphone

2 Answers

No power


Make sure you have an original OEM charger for the MDA. Many of the knock off chargers don't provide the right amperage for the device. What happens is that since the phone is completely dead, it can't regulate how many amps the battery should get during the charge and an incorrect charge current won't charge the battery. I'm guessing that someone sold you a Motorola RAZR charger or another knockoff made for the RAZR. This might charge your phone when the battery is working, but not when it's DEAD. Also you won't have luck plugging it into a computer USB cable because, again, the phone can't tell the computer what charge to send and most computers only produce <0.5 amps in the USB port.

Get a charger that states it is an OEM (original eqipment manufacturer) device or one that is specifically designed for the MDA (or Cingular 8125). eBay is full of them.

Bad charger (probably won't work for a dead battery)

Good Charger (correct amperage and designated for the MDA)

Jul 08, 2008 | T-Mobile MDA

3 Answers

8125 will not reboot


You need to jump start the battery.. The phone's charging capability is controlled by software (pretty dumb) so without enough juice from the battery it won't charge.

Grab an old USB cable (or other 5 volt source) and cut off one end.. take the red wire and put it on the battery contact on the end with the red plus sign. Put the black wire on the other end. Hold the wires there for about 3 minutes. Be careful not to switch the positive and negative.

Now reinsert the battery into the device, and without turning it on, plug in your charger. the charging light should come on shortly, and just leave it off charging for about an hour before turning it on..

Thats all Folks

Dec 04, 2007 | Cingular Wireless 8125 Smartphone

3 Answers

T-mobile mda usb port broken


try other USB ports on your comptuer and try it on another computer before trying to open it up

Nov 13, 2007 | T-Mobile MDA

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