Hello
My Mac Pro ( A1289 ) 64GB RAM automatically Stop Booting , Just Power White LED Blinking when i press pwer . i hear fans,Hdd,Dvd working . Black Screen Empty . I Google it . all talk about RAM . i remove it and try it one by one and i remove VGA cards also . i remove bios Battery . i press small buttons on the board . SMC.PRAM i try it also .Remove Bluetooth ,WIFI Cards Also .
Still Not working . AnyHelp Pls 😟
Thanks
Mac Pro, iOS 9.3.5, A1289
A1289 is Mac Pro 2009 through 2012 or Mac Pro 4,1 and 5,1.
The blinking power light, especially in groups of 3, is an indication that there is not enough RAM that is working to start up.
The memory DIMMs are Not installed in pairs. Each groups of 4 slots on the mainboard at the bottom of the chassis is semi-independent. It should boot with as few as one DIMM, possibly one DIMM on each side.
Recently I Change the mainboard with Ram and CPU ( i take it from other working mac and try it ) its same problem not booting and blinking power light .
In that case, perhaps the power connection to the board is not right.
Mac Pro Not Booting Just pwer Led Blinks white
