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I’m frustrated

Iphone back light won't work.

My iphone 3g's backlight wont work. Meaning that the screen is completely dark unless you put the screen in direct light. I checked settings and tried to checked the "brightness". The brightness was half way, so I decided to raise it all the way and my iphone's back light worked for half a second. I was confused. I went to apples website and followed the troubleshooting provided. Nothing worked. I tried to reset the settings. I restored it. Nothing works.
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  • Hello All,

    I've read a number of sites that describe the backlight issue and there seems to be some confusion about how to fix a 3g vs. a 3gs. My understanding is that a 3gs has a coil (6r8) but the 3g does not - so if you have a 3g ignore the 6r8 talk. Correct?Some websites even sell the 6r8 chip and claim it is for the 3g. Is it accurate to say that the 3g does not have a coil?

    So, if it is true that the 3g does not have a coil like on the 3gs, does anyone have a solution for the backlight issue if the lcd is replaced and the backlight still doesn't work - beyond using a toothbrush on connector 3?

    I've seen a website that explains the iphone 3g backlight circuitry but the site doesn't offer any solution to the problem as far as I can tell. I think for that site to be useful, you need to have extensive knowledge of how circuit boards work. I can do some basic soldering but I'd need similar instructions such as are available for the 3gs 6r8 circuit. Anyone encounter anything like that.

    Thanks.
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  • hi my i phone 3gs got backlight problem my wife play a game then suddenly we got sleep when i woke up my backlight not working what will i do????
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  • I’m frustrated
    alright well my phone isnt a iphone 3gs its just a iphone 3 the one out before the 3gs , it has never had water damage the screen cracked about 2 months ago but that never effected it , but today i had my phone in my pocket i checked the time, phone was working fine, brightness and all about 5 mintues afterwards i recieved a text message so i reached in to my pocket but was unavaible to read my message as my screen was completely dim i can faintly see the screen , i live in the middle of western austrailan and there is no apple shops to take my phone into, does anyone have suggestions which could help me to fix my iphone 3 At home by myself ?
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  • I’m happy
    Backlight stopped working after water damage. I opened mine up, popped off #1-7 and left it to dry over night near a vent for the home heating system. The next day I popped off two metal covers and dusted everything off with a paintbrush (1 cm wide, soft-bristle). Found minimal corrosion in some areas and was impressed that the paintbrush removed it. Looking good as new, I put everything back together. Backlight working again.
    Thanks for the diagram - my phone's corrosion was in a different place, but I wouldn't have thought to pop off the metal covers, so that was especially helpful.
    Wishing everyone patience and success. And think about getting a good case if you're taking your phone out in adverse conditions!
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  • I’m Baffled
    I've got the best story ever played golf yesterday and on the last two holes a police helicopter was searching for a criminal or something distracting enough to leave mi phone on 17th tee box (on a blue box marker).When i finished my round i overcited it n when i remembered it i got to the 17th tee box and the sprinklers were ON!!maybe just turned on but massive i ran all the way to the phone when i saw one sprinkler just wetting my phone to pieces,grabbed it shook it off n let it dry but tried only once to see if it will werk lcd flashed then flickered.Next Day i didn't get a flicker or any lcd lighting at all but phone still werks n i hav to look at it in sunlight or direct light? any suggestions would be greatly appreciative!!
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  • i dropped my iphone in the hottub(i know, i know) but it stayed on for a minute and then hasnt come on since. only in direct light can i use it which i have gotten pretty good at. i did take it to a iphone repair guy who replaced the coil and still nothing. he said it would be cheaper to buy a new phone then replace the circuit board. is there a way around this?
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  • you can find the backlight coil and IC and fuses here

    http://www.cyberdoctormd.com/new-ipho...
    for iphone 3G 3GS 4G 4GS and ipad 1 2 3
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  • I’m happy
    I dropped my phone into a lake at 3 in the morning, tried to suck as much of the water out as I could. Put it into rice for 48 hours and turned it on and thought it didn't work. Until I went and accidentally hit the ringer/ vibrate switch and my phone vibrated. There was no backlight on it, it was like using the phone with blindfolds on. I researched and found if you hold a flashlight up to the phone and go to your settings and mess with the brightness it will snap right back on!
    • I just did this and it worked!! Don't know for how long it will work but with a flashlight i was able to barely see the icons enough to set the auto brightness to OFF and slide the brightness bar to the very lowest, turned the iphone off and the on and the problem is solved... temporarily :)
      There is obviously a problem here because the minute you jump up the brightness bar it will go dark again! maybe with these specific symptoms some genius can actually figure out if it is the coil, the IC or what the heck..
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  • You're going to have to get it taken apart and have the board cleaned in an ultrasonic cleaner.There's still corrosion eating away in there.
    Rice is a good first step but not the final solution.
    We work on Apple i devices only.
    if you would ike us to fixit contact us

    Tinner105@verizon.net

    or if you would like to try to repair it your self we wqould be glad to help you do it.

    Tinner
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  • I have same issue as everyone else. I was able to lower the brightness level to the lowest setting in "settings" and then turned it off and then back on. It came back on in the low brightness setting (as would be expected). I then was able to raise the brightness in "settings" to a point that I could see the screen again! However, once I reached a certain brightness level it would fail to the dim state again. It appears that the failing component has a max threshold before going dim again. At least at half brightness I can see everything on the screen until I get it properly fixed!
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  • Hi i also have very similar problems. My son dropped my phone in hos water troth for about 2 secs and my phone still worked perfectly for hours i blew out as much water as i could and it still worked fine i put it on charge and left it all night then got up and no light thought it was dead but i took it off charge and put it back on and it vibrated. I took it apart and the sensors have not gone off only the one where you plug the charger in i have cleaned everything dust even taken the board off and still no water damage i put it in rice for 24 hours and my backlight works but is very faint i restore it and everything but nothing. going to try the brightness settings next but im running out of ideas.
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  • well... cleaning it worked 4 me... didnt see anything on the board, but taking it apart and "cleaning" that did the trick... I used rubbing alcohol.
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  • This reply was removed on 2012-10-08.
    see the change log
  • This reply was removed on 2012-10-08.
    see the change log
  • Hi i would like to ask because my iphone 3gs is intermittent dim of the screen back light but all the application icons is working, if any body can help me
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  • Ah this happened to me (iPhone 3GS)..Sucks... but I've managed to FIX IT :)
    My phone got in contact with just a tiny bit of water on the side of the bath, and the backlight stopped working.
    Such a nightmare, I read through loads of forums and watched the videos. Firstly tried taking my phone apart to dry it out/ clean out any residue. Only I couldn't find any residue and it was all dry inside by then. I cleaned it all anyway and put it back together and still no light. Was thinking I'd have to replace the coil when I read somewhere about replacing the display. Thought I'd try it out with my boyfriends phone (I switched our displays) and (hooray) the light worked on my phone with his display. I ordered a new display on ebay for a tenner and have now replaced it and my light is working very well. I would suggest doing this instead of soldering on a new coil or taking it somewhere to be fixed. Read up on how to take apart iPhone first, but you should only need to take off the display (which isn't too hard).
    Good luck to everyone with this problem I hope replacing the display works for you too. Will never take my iPhone backlight for granted again!
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  • I’m happy
    I was getting no image, then replaced my LCD and was disappointed to find that my backlight was dead.
    Jason's response fixed it. Thanks!
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  • Hey there...

    I have a 3G that I use like an Itouch and.....out of the blue the backlight just stopped working (and no I didn't drop it in the loo).

    Reading the above comments that seem aimed largely at wet phones or 3GS's, I am really confused. I have rubbing alcohol ready, just tell me what to clean!

    Thanks
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  • I’m excited my phone works!!
    though its been over a year since this thread started its been a year since my 3gs backlight went out after riding my motorcycle through a rainstorm with the iphone in my jacket pocket. Long story short I just ran across this thread and tried doing what the guy showing the picture of the phone guts did and cleaned the marked area's with a paint brush (no alchohol) and by george it worked like a champ! Just wanted to thank him and tell anybody running across this that there is a chance for this to get your backlight working even if storing the phone in a bowl of rice for two weeks did not!
    Though the iphone technology has moved on like a horse at the kentucky derby, the old 3gs is a super nice phone that does enough and works well enough to hold onto for a minute....anyway thanks
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