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I just replaced my inverter and inverter cable on my Macbook and now it will not turn on. I took the keyboard back off and checked for any cables that might have been left loose and there were none. My MagSafe power adapter is lighting up both green and orange as normal. I tried an SMC restart with no success. Is there anything else I can try before having to replace the logic board?
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An inverter/inverter cable replacement should have absolutely no effect on the computer's ability to power up. I would tend to suspect the topcase connector is not fully seated. Have you tried powering up with the topcase loose, so that you can verify the connector is in place?
Also, you can disconnect the topcase completely, and when you connect the AC to an A1181 with no topcase, it should automatically power on. If it comes on, that's a good indication that it's a topcase issue.
Lastly, if that doesn't work, depending on which model you have (early models don't have them), you can bridge the power-on pads on the board to power the machine on without the topcase. Look for a tiny power symbol with two metal dots near it, usually just beneath the fan.
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