Power and display question?

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iMac Intel 20" EMC 2133 and 2210

Model A1224 / Mid 2007 and Early 2008 / 2, 2.4, or 2.66 GHz Core 2 Duo processor

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Mike @mike70554

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发帖于: 2011年10月8日

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Power and display question?

Ok folks... I have an iMac a1224 with no power to the LCD. External monitor does not work either. I have replaced the following:

Hard drive (currently blank until I can see to install OS)

Power supply

Graphics card (yes it can be replaced. It is not soldered to the logic board.)

Logic board

At this point I will not fail if I have to replace every darn component in the thing. There is no power to any of the USB ports or the external display port.

Led 1, 2, and 3 all come on but never #4.

Anybody have any advice?

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I think I am going to start with the power cable then move on to the inverter unless anybody has a better suggestion. Is it possible for the power cable to go bad?

由 Mike 完成的 2011年10月9日

I have now replaced every major component in the darn thing and it still doesn't work. There doesn't seem to be any power getting to the LCD or the external ports.

由 Mike 完成的 2011年10月15日

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mayer @mayer

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LED #4

Indicates that the computer and the LCD display panel are communicating. This LED will be • ON when the computer is turned on and video signal is being generated. If the LED is ON and there is no image on the LCD display panel, the LCD display panel or inverter might be installed incorrectly or need replacement.

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LED #4 doesn't turn on. Also seems there is no power to the external ports such as USB or external monitor. I assume the inverter doesn't play a role in external display.

由 Mike 完成的 2011年10月9日

The inverter has nothing to do with an external monitor and helps to isolate the problem. My answer is a quote from Apple, not my opinion.

由 mayer 完成的 2011年10月9日

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I think I am going to start with the power cable then move on to the inverter unless anybody has a better suggestion. Is it possible for the power cable to go bad? — Mike
I have now replaced every major component in the darn thing and it still doesn't work. There doesn't seem to be any power getting to the LCD or the external ports. — Mike
LED #4 doesn't turn on. Also seems there is no power to the external ports such as USB or external monitor. I assume the inverter doesn't play a role in external display. — Mike
The inverter has nothing to do with an external monitor and helps to isolate the problem. My answer is a quote from Apple, not my opinion. — mayer

iMac Intel 20" EMC 2133 and 2210

Power and display question?

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