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My Mac Pro wont turn on or startup at all

So i have a late 2009 mac pro that i got from a family member. Up until last year October it was still working and operational but now i cant get the thing to work. I dont want to sell it as it is a beast of a system and would like to use it again. For those of you wondering i have replaced the small 3v lithium ion battery and theres nothing wrong with the power supply or the logic board. I cant jump the power pads and the gpu doesnt seem to have any problems either. Can anybody please help me?

Répondre à cette question J'ai le même problème

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When you press the power button, do you get any sort of fan spin?

par

not at all. the best i get is when i plug in my power cable, which gives of a quick red light off the logic board before going back to being dead.

par

Yes, that is the my case. @hootonberg

par

The furthest diagnostics that i have gotten off it is a corrupt efi, and although i could fix it with a chip, i dont have the money currently to do it.

par

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Hey mate! Had a similar problem with my mac pro! That bloke was a solid machine but one day it would not turn on, I cleaned the RAM and it booted fine! Had a bloody time trying to figure that one out but in the end it turned out to be simple!

Cheers from down under!

TC

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Oh and, did you check the PSU with a multimeter?

par

no i did not. any ideas on how to do that? when you say cleaning the ram, how did you do that?

par

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  1. What monitor showing? no signal detected?
  2. Is it single CPU or double CPU? If it is double CPU then whether using single CPU (on the right side one after removing the left one) or switching the CPU between them (partially, temporarily) solve the problem (rebooting with loud fan spin)?
  3. consider CPU tray problems?

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The monitor is not showing anything. I have not tried using one cpu. Will try that now. I have considered the cpu tray having problems but then again i considered the power supply also faulty only to realize it still works.

par

So using single cpu doesnt work. Its still unresponsive and doesnt want to turn on

par

I'm not sure whether you have solved your problems already, but I just found this on my Firefox's old tab. Try to remove all HD or SSD and put the other SSD with working OS inside? Depending on your current OS, have you swap/ replace the GPU? Do you have any friend that have the same machine so you can locate the problems more quickly and efficiently by swapping the components.

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Caylem Else sera éternellement reconnaissant.
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