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!

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.

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!

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?

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?

I forgot to mention--it WAS turning on with noises-by not turning on i mean no screen.

sorry! thanks

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? :(

Most of these issues are related to the nvidia chipset...they used an inferior pairing of materials on it's manufacture up until jun. jul. 2008, when they had to fess up to apple and change the architecture...however, they were allowed to keep shipping to apple the "defective" chipset until inventory depletion...

so if you got a powerbook that has a video card that died, (heat breaks the seating of the chip) there may be a class action lawsuit in the making, as they may be required to recall all the macbook with the "defective" chipset...

follow this link to reasons and what's been talked and done about it, so keep your receipts and paperwork and try and confirm if you have the "defective" chipset

http://www.theinquirer.net/inquirer/news/670/1049670/nvidia-heat-causing-macbooks

Hi i have a compaq homer computer and this program have come up called safe mode and this other one came up called cmd.exe so what do i type in please hrlp

Hi a have this compaq home computer and this program came up called safe mode and this other came up called
cmd.exe so what do i do.or what do i type



help please


thanks alot

For what its worth i was having similar issues with a power book G4 12 inch 1.5 ghz, the computer seemed to be booting up, but no screen, black with lines. i tried everthing the pram thing, the av thing, EVERYTHING. i was trying a bunch of stuff for the like the tenth time when i went to force reboot (control + command+ power) i accidently held down the control and command keys while it booted up, and the screen instantly turned on. couldnt find a boot key that matched this, and it could have been a coincidence, but for what its worth. if youve read this far in the thread, youre probably willing to try anything. UPDATE: it did not perminently fix the problem. screen started to get flaky soon after i started post.

Great work everyone,
S, your solution did the trick for me, thankyou.
Ultimately though i'm resigned to the fact that my 5 year old laptop is a goner.
Above all else this a result of what my tech friends refer to as I.O. or Inbuilt Obsoletivity. When people say they don't make em like they used to, they're right. The need for a continuous demand cycle means it is no ones interest to built machines that won't eventually break. its just a question of how soon that can give diversified ideas of a 'quality build'. Sigh. Its a bloody waste of materials but i guess it does advance technologies.