K850i red light turn on when charger or usb cable plug in & the phone does't start

Fix an Android device that won't charge or turn on Use the steps on this page to fix the following problems on your phone:

• Won't turn on
• Has a black or blank screen
• Turns on but immediately turns off

Hold the power button First, try holding down your phone's power button for 5-7 seconds. This usually restarts a phone.
Troubleshoot your cable, charger, outlet & case

1. Use the charger and cable that came with your phone. To check that the charger and cable are working, try them with another device.
2. Check that the cable is securely connected to the charger and to your phone. Check that there's nothing in your phone's port, like dust or lint.
3. Plug the charger into a wall outlet. To check that the outlet is working, plug in something else, like a lamp.
4. Check that no accessories, like cases or battery packs, cover your phone's sensors or press its buttons.
   
   

Troubleshoot your battery charge

1. Plug in your phone with a working cable, charger, and outlet, then wait one minute.
   
   • If you see a battery icon, your phone is powered off and is charging. You can restart right away.
   • If you see a red light, your battery is fully discharged. If the red light is flashing, there isn't enough power to turn on. Charge your phone for at least 30 minutes before restarting.
   • If you don't see a battery icon or red light after you plug in your phone, the issue could be with your screen.
   Tip: Battery icons and lights can vary by phone. For your phone's details, contact your device manufacturer

Try this , it helped me. 1. plugin the charger (or data cable) for about 15 minutes and keep the red light blinking. 2. while the charger (or cable) is hooked to the phone, remove the battery and memory card for 10 to 12 seconds. 3. keep the memory card out and put the battery back in and whalah, it startes up. (really hope this helps)

I've had this problem just since the last software upgrade. New charger, cable & battery haven't solved it.

Your battery is either not charged or the battery cell is completely gone.

I'll advice that you get another battery and give it a trial, also look out for the charging port. Check if it is not rust in any way because, if the charging port is rust, it will be difficult for the charger to contact the charging port.

I believe what's wrong with your phone is a minor fault, just do a thorough check and you will find a solution to the problem.

Best wishes.

connect your phone to pc with k850i usb cable and run SE update service, see details on www.sonyericsson.com read instructions carefully!

not to worry this is a fixable problem..............take te phone to a mobile shop and have them reflash the firmware n custom pack back into the phone and this will correct the problem....the erom needs to be loaded back on the phone.

Two things.

HTC phones will not charge from the USB port unless you have ActiveSync on an XP or Mobile Device Manager on a Vista PC loaded.

Second, if the phone has been stored for a very long time, 1 year if initially charged, 1/2 year if not, the the battery self discharges to a point the USB port PC Sync software doesn't know the phone is connected. You must jump start a charge on the battery by either and HTC AC charger, a generic AC/USB charger will not work, or you can apply a +5 VDC voltage to the power terminal, marked + and - on the battery case, on the two outside terminals I believe. This 5VDC must be current limited for safety. The Red and Black lead inside a standard USB cable will supply current limited +5 volts at 100MA. Chop off a standard USB cable, their cheap and break out expose the Red and Black leads. While connected to the PC USB port, hold the Red lead to the + battery terminal and the Black to the (-), or other outside terminal, of about 30 seconds to a minute.

Now when you plug the phone to the PC with a good USB, the Amber light on the phone to indicate Charging, may not come on for a while, 5 minutes or so, but it will eventually. If it does not, jump the battery again for a longer period of time.

An AC charger for the 3125 are fairly inexpensive. $7 or so, on ebay with shipping. This may be the way to go. Consider getting one with a new battery. They are sold this way sometimes and sometimes for little more that the charger alone.

first use the wall charger and see if the problem is not your battery in the phone. if the problem still exists, then uninstall and reinstall the driver for phone in the computer. if the problem still exists then you have a bad usb cable. please rate this thanks

If your battery goes COMPLETELY dead, which it will do if phone is not turned OFF and not used for a long period of time, you will need to JUMP START it using you OEM SMT-5600 AC charger. Other AC chargers will not work for this purpose and neither will a USB port.

You can JUMP START the battery using a USB port by cutting off a USB cable to expost the red and black power USB PORT power pins 1 and 4. Remove your SMT-5600 battery and while the modified USB cable is plugged into your USB PORT, hold the BLACK wire to the negative (-) terminal and the RED wire to the positive (+) terminal for about a minute. Replace the battery in the phone and connect the phone to a USB PORT using a standard USB cable. The SMT-5600 charging light may not register for a while, but will eventually light amber to show it is charging, assuming your phone is recoginzed by your computer.

Note some mini USB cables DONOT carry the USB power leads through to the phone, only data. If you have a very thin USB cable, be suspicious the power leads are not being carried in the cable.

Since the USB PORT power is limited to 100ma it cannot hurt the battery, but will insert enough current into a totally flat batter to cause the battery to register a voltage large enough to alllow USB PORT charging, typically 3.7VDC.