MP 1,1-5,1 Mac Pro early 2009 no boot and red ligths in cpu board

[Juanitocamela]

Hi

I have a mac pro 2009 4.1-5.1 8 cores, I try to boot and it turns off instantly, at the same time red lights turn on on the cpu board and the fans speed up.Does anyone know what is going on?

thanks

 

[Macschrauber]

Check if the northbridge heat sink plastic pins are ok.

 

[Juanitocamela]

I hit the interior with compressed air, after 2 hours, it starts already but the front fan sounds intermittently accelerated

 

[Macschrauber]

Red Diagnostic LED DSI510 and Mac Pro not starting - broken Northbridge heatsink rivet

Writing this thread on my Mac Mini because my 8 year old Mac Pro 4,1 (single CPU) is now out of order. My Mac Pro shows red LED DSI510 and is not starting anymore. No chime, but fans running, GPU and hard disks are powered. According to this manual (picture on page 32)...

forums.macrumors.com

 

[Juanitocamela]

my spring is fine, right now my computer is working fine, disassemble and clean everything, surely the error was dust combined with humidity

thanks for the answer

 

[Macschrauber]

Keep an eye on the Northbridge temperature. I have it as a menu Item thru a monitoring tool.

They tend to break, max temperature for the nb is about 90 Celsius.

 

[Juanitocamela]

how can i monitor the northbridge temperature?

 

[KeesMacPro]

how can i monitor the northbridge temperature?

install MacsFanControl , iStats menus or similar.

More accurate than a visual check is installing one of these apps and check NB diode and NB heatsink.
Delta NB diode-heatsink should not be more than ~12 Celsius.

 

[Juanitocamela]

I already did, is it okay like this?

 

[KeesMacPro]

I already did, is it okay like this?

Yes, all look fine 👍

 

[Juanitocamela]

Since I have solved the problem of the fans and startup, sometimes when I started the computer, it does not recognize the internal hard drives (the boot disk if of course) and the network portal does not work, I have to restart and everything returns to normal. why will it be?

 

[Juanitocamela]

Yes, all look fine 👍

Thanks for helping

 

[KeesMacPro]

Thanks for helping

No hay de que!

Since I have solved the problem of the fans and startup, sometimes when I started the computer, it does not recognize the internal hard drives (the boot disk if of course) and the network portal does not work, I have to restart and everything returns to normal. why will it be?

What drives are installed (brand and type)?
If you could post the installed hardware and the OS version you're running, the reader gets an overview.

 

[Juanitocamela]

No hay de que!

What drives are installed (brand and type)?
If you could post the installed hardware and the OS version you're running, the reader gets an overview.

the hard drives are, the factory and two sandisk ultra II ssd