Mac Pro 2008 - not starting !

Spacedust

macrumors 6502a
Original poster
May 24, 2009
935
95
I just got myself Mac Pro 2008 2x2.8 GHz, 2 GB RAM, 2600XT.

The problem is when I connect it to power outlet, only POWER LED is ON, fans are not starting and after 10 seconds POWER LED is going OFF and that's all.

WTF ? :eek:
 

edesignuk

Moderator emeritus
Mar 25, 2002
19,233
2
London, England
So are you saying you paid full price for what you believed to be a working Mac Pro. You've now taken delivery and it doesn't switch on?

I wouldn't be trying to fix it, I'd be contacting the seller demanding a refund, escalating if need be.
 

ericluxury

macrumors newbie
Nov 25, 2009
1
0
Thi

This means its dead?
I was hoping not because I have a similiar problem. Was moving something, and while the computer was on I accidentally unplugged it from the back. Now I am having pretty much the exact same problem. I plug it in and the LED light is always on, but I press the power button and its nothing happens. Was hoping it was not dead or there was some kind of button like a fuse on the motherboard that I would be able to fix it by pressing, but this means it is dead, right?
 

Spacedust

macrumors 6502a
Original poster
May 24, 2009
935
95
I hope it's not dead too.

The seller told me to check everything.

I've tested some components from it in my Mac Pro 2006:

- Superdrive OK
- RAM OK
- Graphics OK

If CPU's are dead will fans be spinning ?
 

Spacedust

macrumors 6502a
Original poster
May 24, 2009
935
95
It happens always. No matter the CPU's, RAM, GPU are in.

When I press DIAG Button it's yellow and it shows STBY.
 

nanofrog

macrumors G4
May 6, 2008
11,719
2
It happens always. No matter the CPU's, RAM, GPU are in.

When I press DIAG Button it's yellow and it shows STBY.
Check all the power cables (remove the optical drive carrier,..., and check those areas), as it's possible one came loose during shipping. Don't look at it and assume it's good, pull it, and reconnect (they can fool you).

Hopefully it's something that simple.
 

Spacedust

macrumors 6502a
Original poster
May 24, 2009
935
95
Will check this out :)

I've tested everything right now. Even rear fan.

Heatsinks doesn't matter. It's only a temp controller.
 

nanofrog

macrumors G4
May 6, 2008
11,719
2
Will check this out :)

I've tested everything right now. Even rear fan.

Heatsinks doesn't matter. It's only a temp controller.
There's another thread, where this was the cause. So it's proof that it does actually happen to computers, even if they're Mac Pro's. :eek: :p

I'll keep my fingers crossed, and wish you luck. :)
 

Spacedust

macrumors 6502a
Original poster
May 24, 2009
935
95
I think this is it !

Cables are going into power supply and connectors cannot be properly connected to it making Mac not properly powered.

How to remove whole power supply ?
 

nanofrog

macrumors G4
May 6, 2008
11,719
2
I think this is it !

Cables are going into power supply and connectors cannot be properly connected to it making Mac not properly powered.

How to remove whole power supply ?
Pull the optical bay unit out, unplug the cables, and remove the screws.

But you shouldn't need to remove it. :confused: Just make sure all the connectors are firmly seated to make good contact (remove, then reconnect and make sure it snaps properly).
 

Spacedust

macrumors 6502a
Original poster
May 24, 2009
935
95
I just got service manual for 2008 :)

and it says:

Led 2 Standby (Trickle Pwr) Yellow On Yes
Power supply is providing trickle power

Any one have the same for Mac Pro 2006 ?
 

nanofrog

macrumors G4
May 6, 2008
11,719
2
I just got service manual for 2008 :)

and it says:

Led 2 Standby (Trickle Pwr) Yellow On Yes
Power supply is providing trickle power

Any one have the same for Mac Pro 2006 ?
I'm under the impression it's the same for those models.
 

Spacedust

macrumors 6502a
Original poster
May 24, 2009
935
95
I was asking about Mac Pro 2006 service manual :)

As a owner of both Mac Pro 2006 and 2008 I want to know what's going on ;)
 

Spacedust

macrumors 6502a
Original poster
May 24, 2009
935
95
I've removed PSU, checked all connections and still the same !

Trickle power...

The only possible way to check if it's PSU i to replace the current PSU with my working one from Mac Pro 2006.

But I'm scared. I do not want to have two dead Macs.
 

Spacedust

macrumors 6502a
Original poster
May 24, 2009
935
95
OK.

It looks like Mac Pro 2008 is having different power supply than my current Mac Pro 2006.
 

nanofrog

macrumors G4
May 6, 2008
11,719
2
I've removed PSU, checked all connections and still the same !

Trickle power...

The only possible way to check if it's PSU i to replace the current PSU with my working one from Mac Pro 2006.

But I'm scared. I do not want to have two dead Macs.
OK.

It looks like Mac Pro 2008 is having different power supply than my current Mac Pro 2006.
OUCH!

By chance does the system have any Apple Care remaining?

I ask, as you're going to need new parts. Either a PSU, logic board, or both. There were some bad PSU's shipped in the '08's BTW, and it's the more likely suspect, though it could also be the board.

But it might be easier to get a satisfactory result if you can get it covered under warranty than attempting to go through a return process, as there's no certainty if you'll get a refund. I'm presuming that the seller knew it was bad when it was sold, unless the shipper beat the crap out of it (tears, dents, crushed areas, ... to the box you opened up).

Sorry it wasn't something simple. :(
 
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