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Uefitool mac1/6/2024 ![]() And I prefer you to be right, otherwise it would be a backplate problem, which would be even more expensive for me to get.Īnd on the issue of PRAM, I said because that's what it says in the User Manual that came with it. It must be some capacitor from the source. The problem is if I turn it off for a day. I repeat, after I get it to work (plugging and unplugging the cable and pressing the power button several times) it works perfect. I'm desperate about it, my friend! I even have a Multimeter, but I don't have the molex connector diagram to know what the correct voltage for each input is. I called Apple Authorized Service here in town, and they said they don't support Mac Pro 2012. The problem is that I don't have another machine to test the Power Source. Once I get it to turn on, it doesn't turn off by itself. Sorry, maybe I didn't express myself well!īut the problem with it is that it doesn't call after a day or two without me turning it on. ![]() But before being able to turn on, only the yellow LED 5v standby appears:Ĭlick to expand.Tsialex, thank you so much for replying here!Ībout what you mentioned: "Mac Pro boot/run AHT/ASD, but then the PSU shutdowns." The DIAG TEST shows these lights after it works. I apologize for the long text, but I needed to detail the problem. Yesterday I risked putting it on Sleep mode during the night, and today it turned on perfect. I haven't turned it off for about 3 days. And now I'm desperate about this situation. The fact is that this Mac Pro is how I survive financially, as I have a home studio where I make audio recordings. But I'm thinking that might be what caused the problem. The day before this problem happened, there were several power outages where I live, but since it was plugged into a Nobreack, I wasn't worried. I don't know if it could be the power source either, because when I had PCs, they had similar problems after being disconnected for a few days, and I just had to turn on a hair dryer to heat the source, and they would work again, but my Mac Pro was not unplugged from power, it has the power cord plugged in all the time in a Nobreack APC. I did this and in one of the attempts it took off! I'm worried it's a problem with the Backplane, because here where I pray there's no support for it. But it didn't work! Then I saw a user on youtube with a similar problem and another user saying he could turn it on by plugging and unplugging the power cord several times and pressing the power button several times. I decided to do the same procedure I did before, disconnecting the power cable from the back plate and waiting for a few hours. once again it didn't! The same problem! Quickly turned on the power button light and went out. until I didn't turn it on for 2 days, and when I went to call. And I did it for 3 days straight and it worked perfect. So I was happy, thinking the problem had been solved.Īt night I turned it off, staying connected only to Nobreack's power. I ran the ASD and also didn't find any errors. I repeated the test in full mode, and also found no errors. But before putting the disks, I ran the AHT through a pendrive. I left it on for a while, then turned it off to reset all the devices. And then as soon as I plugged it in it called. And I waited about 3 hours to plug in again. Then I unplugged the cable from the backplane of the power supply. Which I know lasts less and works at a different temperature. But I never had this experience with a Mac, so I bought a new battery, by the way I only found the CR2032 Duracell model. Cards are rare, at least on PCs that only boot with the battery. I found this possibility strange because, as far as I know, the CMOS Battery is used to store PRAM data, however, if the computer is always on, the data will not be reset. I looked it up on the internet and some people said it might be the dead CMOS battery. I removed all disks ( HDDs/SSD), and all connected USB components, and tried a new SMC reset, but without success! So I was really worried because since I bought it again in 2013, it has always worked perfectly. Wiped out! Then I unplugged the power cord for 15 seconds and reconnected and waited 5 seconds to try to power it back on, resetting the SMC. ![]() I pressed the on/off button again but this time no signal. But he quickly turned on the LED on the on/off button, and turned it off. Hi, my Mac Pro 5.1, quad 3.2ghz mid 2012, won't turn on after 3 days without me turning on.Ī week ago, when I tried to turn it on, after not turning on my Mac Pro for the weekend, I went to turn it on for work.
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