Test results for 4SNS/1/40000000'TmOP Error.
Hey Guys,
Some of you have reported getting this 4SNS/1/40000000'TmOP error when running the AHT. Well I got it too on a week 12 MacBook and on a week 9, both stock 1.83Ghz. After searching through several posts on this board, the users who have had this error report that it's based on heat and it only happens when the machine was heavily used and they seem to think that this is the cause for the macbook running so hot. They also reported that the fans don't work on machines that exibit this error (that is wrong). I set out to test all these conclusions and this and to see where this error comes from and I found some interesting things that you may all love to know and I think it is part of every macbook to date.
The Tests: All in extended mode with stock apple ram
1) AHT was run 35 times on Extended mode only on battery and no error showed up.
2) AHT was run 35 times with battery fully charged and adapter plugged in on green LED (not amber) with no errors. (battery was not calibrated). This test was ran with calibrated battery and produced the same results. No error.
3) AHT was run 1 time with battery half full and adapter charging the MacBook's batt and the error showed up after one single pass. (computer a little warm, but not hot). Same was performed with a cold machine that sat for 5 hours and the same resulted.
4) AHT was run with adapter in and battery removed 35 times and no error showed up.
My conclusion after running these tests on two identical machines, one week 9 and one week 12 is that the error is related to a power problem on the motherboard (too much power being drained) or the way the adapter charges the battery or even the battery itself, and not a misfunctioning heat sensor as some pointed out. The fans turn on during the hardware tests just fine (they are quiet in most applications that require CPU power while in the OS, ahrd to hear but spinning) except for the instance when the battery is being charged and the computer is in use, that is when it gets the hottest I noticed, even if left alone to idle.
This may very well be causing the CPU whine aswell or the two problems are related, but this is just a hunch, I can't yet pin the whine on the error in the AHT due to sufficient evidence and a way to test it systematically, but I can reproduce the Error and make it go away at will and come back, very very consistently. If any of you want to test my results I would appreciate it, just follow the 4 tests and tell me if you get the same thing, because a power issue being solved might be the answer to the whine, the error and the hot operation of this beautiful machine.
I wanted to bring this to your attention because both of my machines exibit this problem and I doubt Apple has motherboards free of this problem even when they offer a fix at the factory, but some users report not seeying the error at all, and my gut feeling tells me that it manifests it's self only when the computer is on ac and charging the batt, and that could be the reason why some see the error and some don't, depends on the state the machine is in when testing with AHT.
Cheers and I hope some of you will test this out.
Felix
Some of you have reported getting this 4SNS/1/40000000'TmOP error when running the AHT. Well I got it too on a week 12 MacBook and on a week 9, both stock 1.83Ghz. After searching through several posts on this board, the users who have had this error report that it's based on heat and it only happens when the machine was heavily used and they seem to think that this is the cause for the macbook running so hot. They also reported that the fans don't work on machines that exibit this error (that is wrong). I set out to test all these conclusions and this and to see where this error comes from and I found some interesting things that you may all love to know and I think it is part of every macbook to date.
The Tests: All in extended mode with stock apple ram
1) AHT was run 35 times on Extended mode only on battery and no error showed up.
2) AHT was run 35 times with battery fully charged and adapter plugged in on green LED (not amber) with no errors. (battery was not calibrated). This test was ran with calibrated battery and produced the same results. No error.
3) AHT was run 1 time with battery half full and adapter charging the MacBook's batt and the error showed up after one single pass. (computer a little warm, but not hot). Same was performed with a cold machine that sat for 5 hours and the same resulted.
4) AHT was run with adapter in and battery removed 35 times and no error showed up.
My conclusion after running these tests on two identical machines, one week 9 and one week 12 is that the error is related to a power problem on the motherboard (too much power being drained) or the way the adapter charges the battery or even the battery itself, and not a misfunctioning heat sensor as some pointed out. The fans turn on during the hardware tests just fine (they are quiet in most applications that require CPU power while in the OS, ahrd to hear but spinning) except for the instance when the battery is being charged and the computer is in use, that is when it gets the hottest I noticed, even if left alone to idle.
This may very well be causing the CPU whine aswell or the two problems are related, but this is just a hunch, I can't yet pin the whine on the error in the AHT due to sufficient evidence and a way to test it systematically, but I can reproduce the Error and make it go away at will and come back, very very consistently. If any of you want to test my results I would appreciate it, just follow the 4 tests and tell me if you get the same thing, because a power issue being solved might be the answer to the whine, the error and the hot operation of this beautiful machine.
I wanted to bring this to your attention because both of my machines exibit this problem and I doubt Apple has motherboards free of this problem even when they offer a fix at the factory, but some users report not seeying the error at all, and my gut feeling tells me that it manifests it's self only when the computer is on ac and charging the batt, and that could be the reason why some see the error and some don't, depends on the state the machine is in when testing with AHT.
Cheers and I hope some of you will test this out.
Felix
MacBook Pro 1.83Ghz 1Gig RAM, Mac OS X (10.4.5), Dell XPS Pentium D Extreme Edition 3.2GHZ, 4 Gig Ram.
