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riokiva55 Level 1 Level 1 (0 points)
I have what was a very loyal G4 Titanium giving me trouble. About a week ago the LCD would start to turn black. Now when I attempt to boot up all I get is a black screen. I have had intermittent success when booting up using the safe boot but usually it will bring up the logon screen and freeze. When I was able to, I did run the Hardware Test and version 4.0.6 of TechTool Pro. Both indicated no problems. I also ran the Disk Utility and corrected any issues. I am pretty much stuck with the black screen. It does chime when it boots up. I have several versions of OS that I've tried to boot from but no success. I've taken the battery out, I removed the ram chips. I think I've followed about every recommendation that has been posted. Just wondering if I've missed something before I take it to a repair shop. Anyway of narrowing HD versus logic board?

G4 Titanium DVI 867Mhz 768MB Workbook, Mac OS X (10.4.11)
  • tjk Level 7 Level 7 (24,165 points)
    Hi r,

    Next thing I would try is hooking up an external monitor and see if it will boot.

    Do you get a normal looking display when booted from an install disc or the AHT or TTP discs?
  • riokiva55 Level 1 Level 1 (0 points)
    Tried two different external monitors (one VGA and a TV using the S-Video) with no results. The screen was normal when it would appear when using the discs.
  • riokiva55 Level 1 Level 1 (0 points)
    Okay, still needing advice. I went back and retried the external monitor idea but this time used a straight DVI connection. Both the lcd on the Titanium and the external monitor worked perfectly together. I decided to reinstall the 256K ram memory in the second slot that I had removed and I am back to the black screen and nothing showing on the external monitor. I plan to remove the second ram again and see if the lcd and external monitor begin working again.
  • tjk Level 7 Level 7 (24,165 points)
    reinstall the 256K ram memory in the second slot that I had removed and I am back to the black screen and nothing showing on the external monitor. I plan to remove the second ram again and see if the lcd and external monitor begin working again.

    That's exactly what I would suggest. From what you've stated so far, sounds like a good chance it's a RAM issue.
  • riokiva55 Level 1 Level 1 (0 points)
    Same result. Actually was able to reinstall the OS this time but after rebooting, it was right back to the black screen on both the powerbook and the external LCD.
  • funkymonkeypie Level 1 Level 1 (95 points)
    If you have isolated the ram stick as being the problem, before replacing or tossing it, try rubbing the contacts on both sides with a pencil eraser. I sounds like voodoo but the eraser is slightly abrasive and will clean the contacts of any oxidation. The pink works ok but if you have one of those double ended pink/blue old-school erasers the blue end works like a charm.
  • tjk Level 7 Level 7 (24,165 points)
    Looking for a pattern here. So when you remove the "second RAM" it sounds like twice the PB has booted immediately afterwards, but then it won't boot again? If that sounds possible, give it another try and see if that is what's happening.
  • nycvogue Level 1 Level 1 (0 points)
    I have the black and grey screen of death! I wanted to reformat my powerbook, therefore, I cleaned everything off of my computer, and saved it to my external hard drive. I know, this was probably a stupid move. After doing this, I shutdown my computer, and tried to restart it. When the computer came back on, I recieved the message: "Unable to find driver for this platform. You need to restart your computer." SO, I tried restarting several times, and even tried the procedure for startup in safe mode, but still back to the very same screen everytime. What the **** have I done, and can anyone tell me how to fix my computer....or have I ruined it forever?!!?
  • tjk Level 7 Level 7 (24,165 points)
    If you "cleaned everything off" your PB, then there is no OS for the machine to boot from. You must start from your installer disc and install an OS.
  • riokiva55 Level 1 Level 1 (0 points)
    I don't think it is the ram stick. I did reinstall it and actually was able to install AppleJack and run it. Rebooted the Powerbook a couple of times just to see if the problem was gone and I am back to the black screen. Safe booted, reset the power management with no response. It was interesting when the lcd was working, I had to make sure that I laid it on the floor or the screen would flicker and sometimes it would lock up but I was able to turn right around and reboot and the screen would appear. Once it seems to be working, I am able to pick up the laptop with no screen flicker. I have removed the second ram chip and will try again tomorrow to see what the sequence is in order to get the screen back for this short scenarios.

    Just one other note, I did get the single tone on start up a couple of times. Doesn't that mean the ram is not recognized?

    Message was edited by: riokiva55
  • funkymonkeypie Level 1 Level 1 (95 points)
    When the screen goes black, shine a bright light on it from close up, can you see your desktop? This is to find out weather or not it's just the backlight that isn't comming on. Even with no backlight you should still be able to see very dim images. If the desktop is still there it is either an intermitant connection on the backlight power, or the internal battery might be dead. Not the main battery, but the one that backs up things like date and time, and hardware settings. Try booting without any network attached, (no ethernet, turn off your wireless router), if you get a "network time error" it may be the internal PRAM battery, it stores the brightness level for the screen.
  • riokiva55 Level 1 Level 1 (0 points)
    Tried the flashlight trick early on and no signs of life (images).
  • tjk Level 7 Level 7 (24,165 points)
    I had to make sure that I laid it on the floor or the screen would flicker and sometimes it would lock up but I was able to turn right around and reboot and the screen would appear.

    If this is consistent/repeatable (not coincidence), it means you have a loose connection and/or something is being pinched/bent possibly causing a short. It is impossible for software to cause this.

    Read about the Orange Ribbon Cable Issue/Fix. Even if it isn't the cable itself, follow directions about snugging up screws and pressure testing all over the PB.

    Once it seems to be working, I am able to pick up the laptop with no screen flicker.

    Interesting.
  • riokiva55 Level 1 Level 1 (0 points)
    Will do. Interesting enough I pulled the battery last night and left it unplugged over night. It did boot up this morning. It allowed me to start to enter the password then the screen flickered and it froze. Back to the black screen.
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