Model A1181: 1.83, 2, 2.1, 2.13, 2.16, 2.2, or 2.4 GHz Core 2 Duo processor

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MacBook overheating and freezing

Ive got a mid 2007 2.16 macbook, which i just replaced with a new logicboard. Now my macbook is working but not for long though it starts up and will end up freezing or not responding. I pulled my top case off and placed a fan ontop off the heatsink and the macbook was working fine. So what could be wrong with it ? Bad logicboard, again ? Bad heatsink ? Bad Fan ?

I tried the apple hardware test and it showed a "4sns/1/40000000:tbot error"

Which is usually caused by the battery, so i tried another.. still same error.

Thanks in advance.

Answered! View the answer I have this problem too

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Did you have kernel panics events with this machine (gray screen asking to restart the computer) ?

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yup, also that round circle cross thing come up too.

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should i just replace the logicboard ? as the replacement logicboard comes with warrenty ?

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I'm not to sure what was wrong with the first logic board. Its symptoms were no boot up chime, nothing on the screen and the power light was on. I got told that the logicboard was dead so i brought another replaced it.

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What about the power pads ? Could bad cable / loose connector cause the 4sns/1/40000000:tbot error ?

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Did you clean the heat sink vents and reapply thermal paste?

UPDATE

You need to see if your fans are operating. Download something like iStat http://bjango.com/mac/istatmenus/

or

Temperature Monitor (free) to find out where the heat is coming from: http://download.cnet.com/Temperature-Mon...

Since you can't get a system installed, try starting up from your original system installation disk and hold down the "D" key. Run tthe diagnostics and let us know what it says.

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If you ran the Diagnostic without the battery you would get the 4sns/1/40000000:tbot error.

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but the battery is connected.. i even tried another battery.

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what are your results from the temperature tests?

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the cpu was sitting around 130deg fahrenheit, then froze up and with the extra fan it was sitting on 104deg fahrenheit..

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Did you reapply thermal paste when you changed the logic board?

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What was initially the problem with the first logic board ? KP event often means a hardware issue but it can be a caused by a bad cable or other cheap part or a loose connector. Open the macbook disconnect all the cables that are not needed to start it and power it directly from the logic board with the top case removed. You'll find the two power pads contacts at base of the fan near the LVDS connector. Look for the the power icon or PWR letters. If you still have the same problem then you can think of send back the logic board for replacement.

http://www.flickr.com/photos/61008642@N0...

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thats not the same as my logicboard, mine doesn't have that power pads in that location, my logicboard is also a different colour.

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http://i1091.photobucket.com/albums/i396... taken from the same location as your photo.

that says pwn rtn not pwr btn.

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thanks Wade, I think you have the good pict.

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So how would i turn my logicboard on with out the top case ?

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Connect the AC adapter and bridge the two solder pads with a small flat screwdriver. It should power up the machine.

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Wade will be eternally grateful.
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