Question about IBM ThinkPad T20 2647 Notebook

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Black screen everything seems to start I can here the fan the cd lights up and spins but the screen is black also the only light that is on is the circle withe z in it... thanks fo the help...

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  • waltdawgg77 Aug 28, 2008

    1 where is the power management component located...
    2 what does the light circle with the z in it mean...

  • waltdawgg77 Aug 28, 2008

    how can I get it out of sleep mode? thanks for all your help your the best...

  • Rakesh 007 Nov 14, 2008

    I have a ibm laptop but it is comes with dim light. i am all redy change TFT FL ( high voltage invertor ) but it is same.can you help me. and ca you give me laptop circuit goid book.

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This is going to be one of three things, 1- bad battery, remove the battery and try starting on the adapter only. 2- bad memory chip or memory slot, remove the memory and try each chip one at a time in each slot, and 3- a failed power management component on the motherboard. If 1 & 2 don't work, then the problem will be with the power management system, which is a common problem with these machines. Unfortunately, motherboard replacement is the only option with a failed power management system.

Posted on Aug 28, 2008

  • Ryan Rogers
    Ryan Rogers Aug 28, 2008

    The power management system is a series of components integrated into the motherboard that controls and regulates the power input, charging, switching from battery to AC, and other functions, not just a single component, although it could be a single component of this system that is causing the problem. In order to track down the exact problem component you need specialized diagnostic equipment and a fairly extensive knowledge of motherboard components or a trace diagram of the board in question. The circle Z is for the sleep mode.

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