G5 No display.

Discussion in 'PowerPC Macs' started by Powelly, Feb 19, 2011.

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  1. Powelly, Feb 19, 2011

    Powelly macrumors newbie

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    Feb 19, 2011
    #1
    I started up my PowerPc G5 the other day, the led at the front flashes, everything seems to start up, but i get no display and the fans run high

    Things I have done.
    Reseated and cleaned the contacts of all the ram (8x256) and the graphics card.
    Reset the PRAM (little button under ram)
    Taken out CMOS battery and tested voltage, full voltages still.

    Help? What else can i do?
     
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  2. skinniezinho, Feb 19, 2011

    skinniezinho macrumors 65816

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    #2
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  3. walterwhite, Feb 19, 2011

    walterwhite macrumors 6502

    walterwhite

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    #3
    did you check the capacitors? The ones on the Logic Board, lower center... if the are bulging (not flat) on the tops of any... they are bad.
     
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  4. Powelly, Feb 19, 2011

    Powelly thread starter macrumors newbie

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    #4
    I meant to say i had reset the smu.
    I have not reset the PRAM, should i?
     
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  5. Powelly, Feb 19, 2011

    Powelly thread starter macrumors newbie

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    #5
    Also i cant see any capacitors, but thats probably becuase they're behind the processors, that i cant take out...
     
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  6. 666sheep, Feb 21, 2011

    666sheep macrumors 68040

    666sheep

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    #6
    Forget about caps as you have PowerMac not iMac G5.

    Flashing light mostly indicates memory problem. Try to leave only pair sticks and test if it will change anything. If not, test another pair/other slots.

    Fans are revving up right from the start or after some time?

    Which exactly PM G5 you have (CPU, model etc)? Is it liquid cooled?

    Provide more details, please.
     
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