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Mac Pro mid 2010 no boot no chime no keyboard light power issue

hi

my Mac Pro mid 2010 does not Boot

it has no chime, no power to turn in the led caps lock light on the keyboard but the mouse led turns On and when I plug in my external hard drive the led lights on the hard drive come On. The white led light next to the power button on the Mac is always solid white when on (Even if I take out any parts of the Mac eg ram, hard drive, graphics card).

i have checked the graphics card on my pc and it works perfectly, the ram i has swapped with my pcs ram ddr3 which I know works. The hard drives have OS X leopard from Installed My power Mac g5 and so it works. I changed the battery but nothing helped. i have done smc and pram resets. But no display is occurring, I know the display works, I used dvi , mini display port, vga i also plugged in a graphics card from my pc to The Mac but did not help (I don’t know if they are supposed to be compatible or if any old graphics card works in the mac). I have tried several hard drives. Also when I boot with no ram the led diagnotic lights don’t come up next to the ram slots. Only when I turn on the computer does a red light flash on the processor board And 2 lights on the backpane board. Fans run and the optical dvd drive makes sound but cannot be controlled via keyboard. I know the keyboard, mouse works.

What should I do next?

Posted on Mar 18, 2018 2:54 AM

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11 replies

Mar 18, 2018 7:40 AM in response to gfegeg4235

The "approved method" for debugging difficult startup problems like this one is to remove everything that is in a slot and look for the chime or the blinking power-on light. Remove all drives, all PCIe cards, all RAM.


Perform an SMC reset by removing AC power card and pushing the power-on button for a quarter minute to drain all the stored energy from the Power capacitors in the power supply. then restore AC power cord, allow it to settle for a few seconds, then attempt to power on.

Mar 18, 2018 2:55 PM in response to gfegeg4235

a) if you get the CHIME, it is working correctly


b) if you do not get the CHIME, you still have problems.


One possibility is that you set the Volume low, the chime was there, but you cannot hear it. If that is the case, put the graphics card back in and hold Alt/Option at Startup. You should get a gray or blue screen with an Icon for every bootable drive (none). This code is all in ROM. No drives are needed.

Mac Pro mid 2010 no boot no chime no keyboard light power issue

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