Question about Sony Ericsson K850i Mobile Phone

6 Answers

Sony ericsson k850i wont switch on - Sony Ericsson K850i Mobile Phone

Posted by mickgriffs on

  • 25 more comments 
  • beefyjoe20 Aug 28, 2008

    my k850i doesn't turn on either. when you turn it on it vibrates, the keypad lights up the blue ring around the camera lights up. it just stays like that until it runs out of battery. i've discovered it isn't the battery because i tried someone elses.

  • Anonymous Sep 09, 2008

    exactly the same turn it on it vibrates keys light on and blue ring round the lens but nothing happens, i hatttee this phone

  • cj_k850 Sep 09, 2008

    My K850i has developed this same problem today. I noticed the screen blank and the number keys all lit up.
    I remove & reinsert the battery then switch on but the same thing happens.
    It's dead!

  • Anonymous Sep 30, 2008

    Sent one last text message and then the phone went blank, blue ring lit up and keypad lit up. Have tried removing and replacing battery, memory card and sim in different combos. It's definitely dead.

  • Anonymous Sep 30, 2008

    my fone has done exactly the same what do i do now, i need it and have no money to but a new fone, someone please helpp!!

  • Thomas Doherty Sep 30, 2008

    Phone vibrates as it powers up, lights come on keypad and around camera lens at back. That's it no screen, no nothing :-(

  • footyemma Oct 01, 2008

    Same Thing Has Happened To Me , Turn On Phone , Up Comes Blank Screen , Keypad Lit And Blue Camera Ring Lit. I Need Help Lots , Please!!!!

  • andymcintyre Oct 02, 2008

    When i try to switch on all i get is a white keyboard & a blue ring around camera lense ant solution

  • naderwehbi Oct 14, 2008

    my problem is the blue ring of death ... I tried the seus but it didnt work please help ...

  • adrian16 Oct 26, 2008

    I have the same fault as well, not liking sony ericsson :(

  • jijomans Nov 02, 2008

    my phone cant switch on, the sorounding lights & camera lights r on but my display not working, service center told me the flashing not working,plase help me...

  • mototom360 Nov 05, 2008

    Hi i have the same keyboard and camera light problem, but when i turn mine on it only stays on for a few seconds before rebooting so updating is impossible, does anyone have any ideas how i could get it to not reboot?

  • Rene2209 Nov 06, 2008

    Same goes to me. I encountered this problem before but it aint that serious, i always managed to get it work again after a short while. But this time, no matter how many times i re-insert the battery, it just wont function. The light on the keypad is on, the blue light surrounding the camera len is lit on too. But the screen is blank.

    This is horrible, i cant go on a day without my phone with me

  • mich434 Nov 16, 2008

    I had the blue ring of death. I tried SEUS but it didn't work - the phone was worse - completely dead no lights or vibration. Then the pc didn't recognise when I plugged in the phone. I removed the battery and tried again. This time the pc saw the phone and SEUS worked! Despite having been on charge the battery was completely drained. I am currently charging the phone to see if it holds the charge but the phone is working again - just have to reinstall all the applications I had. Just a note if you try this - I had a please wait screen for about 2 minutes before it restarted so be patient with it.

  • veryspecial Nov 27, 2008

    my k850i wont turn on

    1. i turn it on

    2. keypad lights and camera light come on but not screen light

    3. it will turn off

    4. it will reboot but then the same lights come on will turn of agen ans so on and so on,,, ?

    i've tried takin the bettery out leving it out and everythingggg wat do i do?

    if it needs flashing will the se shop be able to do that?

  • airskie20 Nov 30, 2008

    i hav the same problem 2

  • Anonymous Dec 01, 2008

    This is horrible! I have the same difficulties...just the other night my phone was working well then it happened...the screen kept on going black/blank but the keypad is still active..keypad lights kept on turning on &'s like the same thing happened after you eject your phone to your pc...that thing happen every 15 sec or less...

  • Anonymous Dec 06, 2008

    my k850 mobile touch pad does not work so any body can help u please

  • phil scott25 Dec 22, 2008

    iv just tried to turn my phone back on and all i get is a short vibrate and keypad lights up and then sweetFA im insured but iv got 40 quid excess is there a quicker and easier solution. phil 245

  • donna_ng_17 Jan 10, 2009

    I have the same problem...brought it to 2 different phone centers and the answer was that it cannot be fixed. I tried the SEUS many times but it still doesn't work!

  • bbs2471 Jan 15, 2009

    i have the same problem with my k 850i...who know how to format manually like nokia...tell mee...TQ

  • pikabear Jan 25, 2009

    This is horrible! I have the same difficulties...just the other night
    my phone was working well then it happened...the screen kept on going
    black/blank but the keypad is still active..keypad lights kept on
    turning on &'s like the same thing happened after you
    eject your phone to your pc...
    and what can i do? :( could not understand the solve.. can u give the step how to solve.

  • Anonymous Jan 25, 2009

    i have same problem was working fine now dosent start ,i have black srean cant some one

    help me please

  • Anonymous Feb 10, 2009

    I just use my phone a few months. So, the phone suddenly black out but the Camera and other function are still working.

  • facz Mar 30, 2009

    i have the same problem to. is it hardware or software problem ?

  • jaywolves_19 Apr 02, 2009

    exatcly the same blank screen with pink line round the outer edge, keypad lights etc, you think a phone this expensive wouldn't break this easily

  • Thomas Doherty May 11, 2010

    Same Problem.........Help please :-(



6 Answers


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I went to this website and updated my phone (erases all phone based memory however so beware)

At least I can turn the blighter on now though! - Phew :D

Posted on Oct 22, 2008



Right well exactly the same thing has happened to me too, just switched off my alarm and BAMB... the blue ring of death!

Posted on Oct 08, 2008



It happened to me the same thing about a month ago, I've searched the web and found out it is a bug, which they call " the blue ring of death". There are two solution to fix this, namely, Flashing, second updated it through using SEUS. I've tried SEUS since it's from SE, and after that, it works. Hope it helps

P.S.: SEUS - Sony Ericsson Update Service

Posted on Sep 05, 2008


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BeefyJoe, did you manage to fix the problem? I've been travelling for 3 months and just as I was boarding my flight to Oz my phone started doing the same thing...and still is! I'm on a backpackers budget as I'm away for the next 9 months and wondered if you managed to find a low budget solution?

Posted on Sep 01, 2008


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You either have a dud power board - firmware stuffed- boot loader buggered- if under warranty get it replaced else it will cost you $100 for the board etc to be replaced...this is something happened to a mate and he just puchased a new phone...

the k850i is very well known for major issues like this to happen but they wont do **** to get it fixed.

Posted on Aug 26, 2008


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Its a fault with the software.......ive had the same problem.........take it to the mobile company they should send it away free of charge. This should be fixed in 5-7 days

Posted on Oct 30, 2008

2 Related Answers


  • 1 Answer

SOURCE: sony ericsson wont turn on

i think the wires that go to the screen are broken. they tend to do that on slider phones and flip phones.

Posted on Jul 24, 2008

Rodolfo Atun

  • 158 Answers

SOURCE: how do i master reset on sony ericsson k850i with a code?


the master reset code for sony is 0000 or 00000, try this code. hope it will help...


Posted on Feb 03, 2009

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1 Answer

How to unlock se k850i

To Unlock Sony Ericsson K850 use unlock code.Visit the site
get Unlock code and Follow the unlocking instructions below and unlock it easily.

Sony Ericsson K850i Unlocking InstructionsWarning : Do not enter any wrong unlock codes on your Sony Ericsson K850i mobile phones. If you enter over a certain amount of wrong unlock codes on your Sony Ericsson K850i mobile phone, your phone may get hard locked and sometimes become unusable.
1 - Switch ON your Sony Ericsson K850i without any SIM Card,
2 - Press the left arrow key/button once,
3 - Press the button * twice,
4 - Press the left arrow key/button once,
5 - The message "Personalize with MNC2" will appear, (or you will have displayed an unlock menu, select the lock you want to unlock)
6 - Enter the Unlock Code.

Nov 24, 2012 | Cell Phones

1 Answer

My sony ericsson K850i is restarting before it can even switch on.

its mostly a software problem try to reinstall phone software u can easily do it through sony ericcson PC suite

Feb 28, 2011 | Sony Ericsson K850i Mobile Phone

1 Answer

Sony Ericsson K850i not switching on

Try reading K850i Firmware Overview.. There are some issues with firmware. Such as random reboots and BROD (Blue Ring of Death) i was recently victimized by this BROD. 037 firmware is the most stable firmware so far.. i would advise you also to downgrade your firmware first until SE releases a new and more stable firmware..

Jul 23, 2010 | Sony Ericsson K850i Mobile Phone

1 Answer

Lights on keypad and camrea ring but wont turn on

i fixed this on mine by using sony ericsson update service

May 16, 2009 | Sony Ericsson K850i Mobile Phone

1 Answer

My k850i drop into the water

do not try to switch it on anymore...take it to a mobile service center to have them service and fix it for you.

Aug 22, 2008 | Sony Ericsson W850i Cellular Phone

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