I was also thinking along the line that some obscure part in the PS might have needed to warmed up just at the right amount at the right time. My theory is that the initial surge of being plugged in with the power with the power button being pressed at the right time is getting the power supply over some hump. There is something about catching the power supply at a good moment just after it getting power from the AC line and pressing the power button that does the trick. Simply resetting the SMC does not have the same effect. I can get the system to start up by unplugging it and plugging it in several times repeatedly and eventually pressing the power button will start the system. This system has hardly ever been used and is off most of the time.Īlso, if 'Kolvir' ever got his system fixed and how he did it.Īny of you please respond. I'm going to try 'tobyglyn's' suggestion first because it makes sense.
Simply reseting the SMC does not have the same effect. I VERY SERIOUSLY do not think it is the processor board. The PWR SUPLY test LED is good at every step of the process with the exception of getting fans and power when I reinsert the processor board. system and when though every isolation step and never got anything definitive.
I'm Apple Certified so I tore it down to min. Pressing the button again generally does nothing. I went to turn it on this weekend and there is a small initial click followed shortly by a second and final slightly different sounding click and then nothing. My MP 2009 remains off most of the time since it is just a backup. I have two towers a MacPro Early 2008 (my production system) and a MacPro Early 2009 (my backup system). Another Stackexchange user reported that this strategy could extend to plugging monitors on a different side as the charging cable to keep things cool on both sides of the chassis.I'm having the EXACT same problem Kolvir was having. Luckily, there is a simple solution to this, and it's to charge your MacBook using only the right-hand side ports while using the left-hand side ones for peripherals. Sensors that monitor the Thunderbolt ports seemed to confirm this to be the case even if the CPU temperature doesn't warrant the throttling. In this case, a careful investigation revealed that having a peripheral plugged into one of the left-hand ports at the same time as a charger is connected to the other increases the temperature of the MacBook case. According to Apple, one of the functions of kernel_task is to manage your MacBook's CPU temperature by deliberately making less of it available for apps that are using it too intensely. If that wasn't enough, restarting the MacBook in question won't solve the problem, with the kernel_task process popping up again as soon as macOS boots up. Specifically, he noticed unusually high CPU usage for a process called kernel_task, which caused high temperatures and reduced overall system performance - not to mention the fact that it keeps those tiny fans spinning on what should otherwise be a relatively quiet machine. The issue was found several months ago by a StackExchange user that reported seeing unusual activity in Activity Monitor. However, it turns out that there are a right way and a wrong way to charge your expensive device, especially if you don't want to see any performance impact. On the official support page, Apple states that you can charge your MacBook Pro using either one of the USB-C ports. Several users have found their MacBook Pro has a habit of maxing out the CPU and overheating when charging using the left side ports. In brief: By the looks of it, Apple may be having a new Chargegate on its hands.
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