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My g4 ibook screen won't turn on

maloneyonmaloney, on Wednesday 6 August 2008 à 19:48:15
Hello,
my g4 ibook starts up with all the right noises but the screen is completely black.this happened after the screen froze while on myspace,i turned the computer off,restarted it,then the usual apple page came up,then loads of lines across the screen.i then restarted it and the same happened.i left it for a day or two in the hope it would fix itself,but now the screen is black,nothing.all the sounds and the fan seem perfect,volume keys ect..really important that i get it fixed,i am in need of help.does anybody know a solution or had a similar problem?many thanks
Configuration: Windows XP
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nfc883, on Thursday 7 August 2008 à 18:16:52
Hi Maloney,

First things that come to mind are just the basics:

Reset pram: hold down cmd-option-P-R keys just after starting up. Keep holding these down. You will hear the startup chime again. Keep holding until you hear the chime three times.

This has worked for me in similar situations, but I don't know why because it shouldn't work: hold down cmd-option-a-v at startup. It's an old key command for use with AV monitors, but desperation makes odd fixes look more appealing...

Reset the PMU: see this page for directions for your exact model of iBook: http://support.apple.com/kb/HT1431?viewlocale=en_US

Try starting up with the CD that came with the computer: Put the cd in and hold down the C key when you start/restart.

Look through Apple's support pages if you haven't already. You might find some answers there.

Good luck!
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mahoney, on Monday 29 September 2008 à 21:01:39
i haven't found a cure or solution yet i am afraid,i asked the apple shop about it and they said it coul;d be a number of things,graphics card ect,but he seemed to be just trying to get me out of the shop,i guess because the g4 is considered an inferior model now,but i want mine working again,i am still attached to the thing.if you have any luck let me know,i will also return the favour if i have i find any more news of how to resolve the problem.jamie
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cat studio, on Tuesday 14 October 2008 à 05:03:54
I have the same problem and I did Reset pram as you suggest, It's work :-)

Thanks, thank, thankz
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phamous4u@tmail.com, on Wednesday 3 September 2008 à 21:54:06
hi i got the same problem, my g4 laptop turn on and everything but the screen wont turn on, when i restart it got the noise and the cap lock and num lock got the light but the screen will not turn on, can some one please help me because i need this for my school work!
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Jeffmeetsfrustration, on Saturday 6 September 2008 à 23:49:51
I have the same problem, I just had a friend that works on Macs work on the computer he replaced the fan, and put got me going again, he did solve 1 of its many problems... but I still have the problem where if I use it, the iBook G4 freezes after no more than 10 minutes of use. I restart it and I get this black screen, I get the right sounds by no action, I've tried everything.... Im starting to think this model is used up. I am 80% set on buying a new computer come the end of September, I hear around Sept 26 they are coming out with a new model. So I guess you could say I have given up.... I need my Mac to work soooo badly, but its out of my hands. By the way, I have to wait a couple of hours then it starts up... but freezes after 10 minutes of use. I can leave it on and run NOTHING, and its fine.
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rad, on Thursday 18 September 2008 à 05:04:43
I got the same problem. The computer froze while using iTunes and then when I restarted I just keep getting a blank screen. I tried everything above and tried resetting using Shift-Option-Command-Power held down for 5 seconds. I got long beep and then the startup at least went until I got the Apple, but the startup wouldn't go any further.

Anyone have ideas?
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Chris, on Thursday 18 September 2008 à 13:11:54
Add me to the list as well....and exactly 1 month to the day after my Applecare expired....

I was able to get back to the desktop to back up anything that wasn't already by repeatedly resetting the PRAM and the PMU. I am pretty sure that this is hardware related though, so that will only work for so long. My basic knowledge is telling me it is the logic board. Luckily, I am getting married next week and will therefore be broke for the next 6 months or so, so I guess I should get used to a computer free life at home!
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s, on Monday 29 September 2008 à 18:32:40
When you said you repeatedly reset the pram and pmu, did it work after the first time? How many times did you do it until it booted correctly?

I also have the exact same problem. My ibook G4 froze for the first time since I bought it in 2004. After shutting down, the blue screen appeared with the apple logo, everything seemed to be booting ok, and then horizontal lines like on a TV appeared and the screen went black. Now everytime I boot I get the fan, the startup tone and a black screen. I tried doing all of the suggestions with no luck so far.
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PastSingularity, on Saturday 20 September 2008 à 01:06:04
Dude, my friend just called about his iBook display failing. I gave him the old (Cmd + Opt + a +v) trick and it blew his mind. Made me look like a god thanks to you. I told him to call if he's got anymore brainbusters.
:)

Thanks again, saved his butt while he's on tour...

Will
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s, on Monday 29 September 2008 à 21:34:16
I think I found a solution, albeit a temporary one. After reading the article in the following link:

http://www.coreyarnold.org/ibook/

I placed my ibook on my knee and gently pushed down on both ends while booting up. According to the article, a chip from the logic board lifts from the board causing the problems. By using something (my knee) to push from the bottom while pushing down with my hands, my machine magically booted.When I took the pressure off, it started to fail, but as long as I kept my knee in place, i was able to boot up and save my important files.

The article talks about opening the back of the mac and placing a shim between the bad chip and the back cover. This extra shim pushes the chip in place when the cover is put back on. It certainly is not a long-term permanent fix, but it is enough to get your files back and maybe work for another few months.

S
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shaslove, on Tuesday 7 October 2008 à 17:11:13
I would agree with the logic board issue, I had mine replaced twice on my Ibook when it was still under warrenty, and I had the same issues you are describing. I nearly had a heart attack at the time, since I used it heavily during school and I needed all the assignments for the last semester.

My fan never turns on, and this thing is hot all the time.
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mahoney, on Monday 29 September 2008 à 22:29:29
hey there,thats very interesting.i have put it on my knee as it says and yes it does give me a screen again,but its still that tv liney thing,has it worked for you?
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s, on Tuesday 30 September 2008 à 00:50:17
You have to keep the pressure on the ibook the entire time. If you let go or reduce the pressure, it will display the lines and then fail. I plan on putting the shim inside my machine. I will keep you all posted if it works.
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mahoney, on Monday 29 September 2008 à 22:39:11
i got it to goto my password that time,then the galaxy screensaver thing came up for leopard then it crashed,but hey its the best progress iahve seen in months and months,well done to all involved.i feel quietly confident that it will work again if i try putting the wedge under the board.is it risky?
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Renny, on Friday 3 October 2008 à 00:20:13
Wow! Cmd+option+A+V did it on my 6 year old iBook G3. Got the blank screen of death after some crazy lines across the screen. Couldn't get it to come back. I know that a weak battery can cause this too - as it happened with my G4 iBook and has not happened for a year with the new battery. What a lifesaver
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Vivian, on Saturday 4 October 2008 à 19:41:10
I'm having the same problem. colored lines, blacked out screens. Resetting the PRAM worked for a while, then when that stopped i did Ctrl+Cmd+Power, and that also forced my screen to come on occasionally. then it stopped completely and i wasn't able to turn it on until i took out my battery. I am still getting the colored lines, but my computer won't get them as long as i have it on a flat surface and don't move it at all. The second i move it the colored lines come back and it freezes. It works as long as i don't move and I think its worth because i can use it. I also had the loud fan, and the bottom left side of my computer would get very hot suddenly. I really hope this works for you as well!
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Vivian, on Saturday 4 October 2008 à 19:43:14
I forgot to mention--it WAS turning on with noises-by not turning on i mean no screen.

sorry! thanks
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Colz, on Saturday 8 November 2008 à 02:31:11
Hello everyone.

I woke up this morning to find my ibookG4 (2004) doing this to me:

http://img.photobucket.com/albums/v166/boilingchill/Image124­.jpg

Everything seems normal (sounds, chimes) and when it starts up, it changes to a blue screen for a second and then reverts back to the static lines. I belive it actually starts up properly. The only catch is all i get are lines!!!

I tried using the VGA adapter to connect to another monitor and its the same so i reckon its not the display. I also did the cmd+option A+V and P+R method to no avail.

I know I'm really silly for not backing up my files and all but all i need is for it to work for about 30 mins for me to back up all my pictures and work (yes yes i'm a sentimental dude) and i can throw it off the 10th storey.

Any ideas anyone? :(
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 thnkdffrnt, on Thursday 20 November 2008 à 21:10:33
This was a VERY helpful thread. My G4 laptop is doing the same thing; first had the technicolor freeze, now black screen. Has any had their laptop repaired through Apple? I'm wondering about how much is the cost for the shim fix, etc. Sure how the Square Trade warranty is enough to cover...
Thanks!
thnkdffrnt
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