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Recent content by arthegor

  1. A

    Mac classic checkerboard

    when i plug the logic board alone, the problem is the same. I have check the hard drive with external atx supply and is good.  In this case i go reccap all analog board and hope that it will work. I keep you informed.
  2. A

    Mac classic checkerboard

    hello  I have already reccaped the logic board. the voltage on 5V line is good only if the analog board is alone. If I connect logic board, screen and drive the voltage is only 4V and 11V. 
  3. A

    Mac classic checkerboard

    Hello  I bought a mac classic with checkerboard problem. After many search i have determined a low voltage on analog board. i have changed 8 capacitor and the opto-oscillator. i have checked the qp2 transistor and diode bridge and is good. i have mesurated with oscilloscope a voltage and the...
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