Mac Pro early 2008 - No video

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Mac Pro early 2008 - No video

I have a Mac Pro 2008 tower that basically is giving out no video.

I've tried other graphic cards and still had no luck.

I can turn on the Mac, the fans start spinning and it chimes. The front LED is lit white.

Inside the tower there is no Red LEDs flashing. I've pressed the diagnostic button on the logic board and the lights are how they should be.

Really confused to what it could be? Originally I thought it was the logic board but I thought the LEDs would of told me otherwise?

Any suggestions?

Thanks

Mac Pro

Posted on Feb 25, 2015 4:43 AM

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Answer 1

lllaass

Level 10

210,411 points

Feb 25, 2015 4:54 AM in response to benopolis

Have you reet the SMC and NVRAM?

Intel-based Macs: Resetting the System Management Controller (SMC)

About NVRAM and PRAM

When resetting the SMC, some users have found that after unplugging the power from the Mac then have to press and hold the Power button to completely reset the SMC

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Answer 2

benopolis Author

Level 1

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Feb 25, 2015 5:13 AM in response to lllaass

I think i tried resetting the SMC but didn't press and hold the power button after unplugging.

Will try SMC and NVRAM and let you know.

Thanks.

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Answer 3

lupyman

Level 1

0 points

Mar 6, 2015 7:06 AM in response to benopolis

I've had the same problem with the two identical Early 2008 Mac Pros within the last year. I've used a USB video adapter to confirm that both of them are booting normally. System information doesn't show any graphics card plugged into the PCI-e slots, but I've confirmed that the graphics card is good. I'm leaning towards a bad logic board.

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