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Graphics, missing hard and disk drives,

Hi FixYa

G4, dual 1.42, 
OS 10.4 .11, 
2 GIG Ram
4 internal hard drives (120G boot-up), 500G1, 500G2, 40G. 
plus addt’l firewire drives.) 23- apple cinema display. DVD combo and CD drive.

1. Intermittent problem - The DVD and CD drives do not show disks on the desktop.

2. Intermittent problem - Disks show up on desktop. Double click on it and prompt states ‘cannot be found’.

3. Intermittent problem - I insert a CD or DVD. The window opens showing all the files. If I click once on a file, the file disappears. If I double click on a file it disappears and prompt says ‘file cannot be found’. If I eject and reinsert disc, files show up again.

4. Consistent problem - In System preferences I select any of the other two 500G internal drives as start up drives, it still boots from the 120.

5. The internal hard drives intermittently do not not show up on the desktop. {The firewire drives always show up fine.)

A few times the unit froze and the grey screen came down stating 'you must restart the unit'.

I opened up the unit, exercised ribbon connectors, disconnected all peripherals, zapped the PRAM, removed Ram down to 512 K, reinstalled the 10.4.11 system from scratch using full install DVD (wiping the 120 boot drive clean). Above problems persists. All along Techtool Pro shows reports no problems.

6. Consistent problem - Random pixelation and dotting on the whole display, mostly arranged in horizontal patterns as it warms up and gets hotter (15-20 minutes). If the door is open the fan starts to run faster and faster. If the door is closed the fan stays at one speed. The pixelation happens with door open and closed. Cinema Display is OK- I tried it on other Macs and works fine.

I replaced graphics card with a used ATI RADEON 9800 Pro. Problem persists. Put back the old graphics card. Problem persists. Boot from TechTool Pro DVD. Problem persists.

*****************
Questions - 

1. Could it be anything besides the logic board, procesor or power supply? If not, is it cheaper to buy a G4 Dual 1.42 on ebay (motherboard and  power supply, no drives, no memory) and moving my hardware into it?
Thnx
Paul

Posted by on

  • lynchcom Jan 05, 2009


    I tried. Apple will not repair as it's discontinued. 
    Thnx



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YOUR MAIN BOARD HAS A PROBLEM JUST TAKE TO A APPle service center

Posted on Jan 04, 2009

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