My trusty mac pro 2008 will not start
All was fine, it operated normally, the machine had not been modded or upgraded for the past year. It just worked until the day it would not start.
I pulled it apart, blew out what little dust there was, checked the connections, stripped it to a minimum.
Trying to start it I noticed a red led glowing tucked away from the normal diagnostic leds.
This led is located on the logic board between the front fan and airport card right next to the two power outlets for additional power e.g extra power for GPU.
This led illuminates steady as soon as power is plugged in and remains on until the power cord is removed.
The led is marked C287 and I have been unable to identify what job it does.
When the power button is pressed there is that internal click the white light illuminates and the fans, all except the GPU fan, start to spin then it shuts down. I have swapped gpu's with the same result.
What I have noticed in this short time frame is that the "post" test is extended e.g the dimm leds should momentarily illuminate but here they are on for quite a number of seconds.
The only time I've been able to start the computer has been when the C287 was blinking rapidly. It then shutdown before I had time to do much as investigate.
Reading the manual - troubleshooting on page 158 it mentions;" Video card diagnostics LEDs" with the mention that "T_Fault LED normally off, this LED lights up if the graphics chip gets too hot" it doesn't give a location so I'm wondering if this is C287 and the reason the computer won't start.
I have istats menu and it doesn't have a GPU temp available so I can't get a reading.
I do not know what sensor operates this T_Fault led could someone tell me?
I do not know what the the LED C287 indicates again could someone tell me?
It looks like another logic board is required but it would make me spit chips if it was just a piece of fluff or something on a sensor causing the problem.
Thanks,
John
All was fine, it operated normally, the machine had not been modded or upgraded for the past year. It just worked until the day it would not start.
I pulled it apart, blew out what little dust there was, checked the connections, stripped it to a minimum.
Trying to start it I noticed a red led glowing tucked away from the normal diagnostic leds.
This led is located on the logic board between the front fan and airport card right next to the two power outlets for additional power e.g extra power for GPU.
This led illuminates steady as soon as power is plugged in and remains on until the power cord is removed.
The led is marked C287 and I have been unable to identify what job it does.
When the power button is pressed there is that internal click the white light illuminates and the fans, all except the GPU fan, start to spin then it shuts down. I have swapped gpu's with the same result.
What I have noticed in this short time frame is that the "post" test is extended e.g the dimm leds should momentarily illuminate but here they are on for quite a number of seconds.
The only time I've been able to start the computer has been when the C287 was blinking rapidly. It then shutdown before I had time to do much as investigate.
Reading the manual - troubleshooting on page 158 it mentions;" Video card diagnostics LEDs" with the mention that "T_Fault LED normally off, this LED lights up if the graphics chip gets too hot" it doesn't give a location so I'm wondering if this is C287 and the reason the computer won't start.
I have istats menu and it doesn't have a GPU temp available so I can't get a reading.
I do not know what sensor operates this T_Fault led could someone tell me?
I do not know what the the LED C287 indicates again could someone tell me?
It looks like another logic board is required but it would make me spit chips if it was just a piece of fluff or something on a sensor causing the problem.
Thanks,
John
