#Macbook pro power cord light blinking manual#
#Macbook pro power cord light blinking mac#

I try to keep scrap machines around for this purpose. Besides that, there's not a lot you can do other than replace parts. Also, disconnect the hard drive and optical cables.you want to remove all extraneous components until you have the machine running, because until the machine is running they will only complicate the situation. And as was suggested, try the SMC reset, and also PRAM. Make sure to test the RAM slots - power up with one module in and the other empty, and then with the other populated and the other empty. From what you've mentioned, your left I/O board does not sound suspicious, although it's impossible to be sure given what I know. In fact, I would leave the battery out until you have a computer that powers on, because it will only cloud the issue. I would not assume you have a good battery, since there are all kinds of things that could be wrong with it. Seems to work with the battery having some charge to it, and some reason I have to hold the power button 10 seconds with the macbook unplug with no battery and then continue to hold it for another 10 seconds when plugging in the ac adapter and then I can press the power button and it turns on, this is only if I don't have the battery in, not sure if that is normal and it does seem to run hot too.Д¬orrect - a 60W will not likely power this machine without a charge on the battery, and an 85W will power it with no battery.

So, from that I looked over the I/O board and took the black like tape cover off the bottom of the I/O board and found what looks like one of chip capacitor next one of the IC's that looked burned and so I took a cap off a modem PCI card that no longer works and soldered that in replace of the burned one, and then test the voltage output from the power cable that goes to the logic board and now its outputting 12.6 volts, I went a head and put everything back together, now the green light turns orange and the battery is charging but it still doesn't turn on, waited 5 minutes and then it would turn on! 5 volts when testing all 3 gray wires being (+) and all 3 black wires being (-) on the power cable at the logic board end which didn't seem right. I did try resetting the SMC but didn't do any good, still didn't power on, so I decided to remove the logic board and left I/O board and look for any components with physical damage and test any fuses soldered to the left I/O, but didn't see any anything, I then test the voltages from the power cable coming from the Left I/O board to the logic board, even when the magsafe plug had the green LED I was getting.

#Macbook pro power cord light blinking mac#

Note: Mac Pro (Early 2008) does not have an SMC_RST switch, refer to the reset procedure steps in the previous section.I got some life out of the macbook now and here is some trouble shooting I did to get it to now power on: Use a non-metallic, non-conductive object, such as a wooden pencil.

Press the SMC_RST switch that is located slightly below and to the right of the row of diagnostic LEDs. Open and remove the metallic outer door.ДЈ. Press the power button to start up your computer.ДЄnother way to reset the SMC on a Mac Pro computer is:Дў. Then reconnect your keyboard and mouse to the computer.ДҐ. Plug the power cord back in, making sure the power button is not being pressed at the time. Unplug all cables from the computer, including the power cord and any display cables.Д¤. From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).Дў. I haven't changed anything physical in the configuration: all memory, PCI cards, disk drives and peripherals have been installed for ages: memory and disks since I bought the machine 2.5 years ago, Apple graphics card since January.ДЎ. I've tried unplugging the power and reseating the RAM and drives didn't fix the problem.

#Macbook pro power cord light blinking manual#

The patterns described in the user manual all have short flashes followed by a longer off period and I'm getting continuous short flashes. The pattern is not one of those described in the User Manual or in online forums: it simply flashes quickly until I kill the power. When I tried to wake it up this afternoon, the status light started flashing frequently.

I used it normally this morning, then put it to sleep (not turned off).

Worked like a charm never a problem in the 2.5+ years I've owned it. Maybe someone has insight on this I can't find anything in my user manual or online.Д®arly 2008 Mac Pro running 10.6.7.