MacBookPro does not power up on AC power or battery.
I've noticed a number of "My Macbook Pro won't turn on" posts here, but my symptoms seems to be different (read: worse) than the other posts that I've read, such as this one.
Here's what's going on:
I have an A1226 15" MacBook Pro (mid 2007) with serial number: W872218YX92. I can't get it to turn on; whether it's plugged into the AC adapter or on a battery, I get no visible or audible response from the machine when I push the power button--none of the lights turn on, none of the fans spin, etc.
I've read about the nVIDIA 8600GT issue, but I don't get any response from the machine at all, so I'm not sure if that's what the problem is. The other thing I've read could be at fault is the 'Left I/O' board', but this thing wont turn on when using AC or a battery. One thing I haven't tried yet is to open it up and check the top cover power switch; is the power switch something that frequently breaks?
Lastly, when the MagSafe adapter is plugged into the machine, the LED on it always glows green--whether or not the battery is plugged in. When the battery IS plugged in, the 'charging' LEDs on it do not light up or blink and thus the battery does not charge.
Make sure you have the right power supply. MacBook Pro's uses 85W power adapters.
MacBook and MacBook Air uses 60W power adapters. That's why my MacBook Pro didn't start.
You can find it out by looking at the power adapter.
I figuered it out by multiply the voltage with the current, like this for example:
V = 16,5V
A = 3,65
16,5 x 3,65 = 60,225W so it's was a 60W adapter I was using.
Which was the wrong type of adapter.
I'm having the exact same problem after reflowing my logic board.
But I found a way to always make it boot.
- Unplug the battery.
- Unplug the magsafe power cable.
- Hold down the powerbutton for about 10 sec and continue to do that.
- While still holding the powerbutton down, insert the magsafe power cable and hold it for another 10 sec.
- Release the powerbutton after those 10 sec and make a "normal" press as if you would normally
turn on your computer.
If that doesn't work then try to remove one RAM memory and switch places and do the method that I told you.
The very first thing I would do is to reseat the Uppercase cable to the logic board as your machine does not seem to be getting a start signal. Check your battery for swelling. Do your restarts without the battery in. MacBook Pro 15" Core 2 Duo Models A1226 and A1260 Upper Case Cable Replacement
Remove completely the top case (unplug it) and try to boot the machine directly from the logic board. Search for the power icon (same as the one on your power button) on the logic board, near the icon there should be two small solder pads. Just briefly bridge the two pads with a small jeweler flat screwdriver (ac adapter must be connected). If the machine power on then your top case power button could be faulty, if not then the DC in board (or the logic board) could be the problem.
Here's a pict from a macbook logic board. Search for the same power icon on yours or PWR letters.
reset the SMC works but you need to follow this and to do all the steps in the way i describe (for macbook pro with removable battery):
1 - Remove the battery with magsafe connected
2 - Remove Magsafe
3 - Hold start button for at least 5 seconds
4 - plugged Magsafe connector
5 - plugged the battery
The light change green to red. Wait 10 minutes and the computer start !
None of this has worked for me. When I try the reset with battery and power out of it and then replug power while button is held in, the fans go wild but nothing else. When I try battery and power out of it, hold power down for 10 seconds, replug Magsafe and battery back in,and try to start it, I hear the optical drive spin once but nothing else. The battery shows fully charged.
I guess my only other option is to disassemble it and see what happened. I think an 85W power supply I had for it that was not from Apple directly, may have done something to it. It seemed awfully warm during the charge process; however, the battery does show charged. That same power supply sparks when I go to connect the Magsafe to the computer. I just hope I didn't fry the board.
The power button turns the computer off, but not back on.
Yosemite OS X 10.10 on mid 2010 MacBook Pro 15"
Any help would be greatly appreciated.
ed a new keyboard connector on the logic board as it had a missing pin,
- replaced the keyboard twice (the second and third keyboards work correctly),
- tried jump starting the computer on with the jumpers but this did not work,
- performed many PRAM resets,
- repaired Disk and Permissions in Disk Utility,
- ran Apple Hardware Test in short and extended mode without any issues identified,
- attempted to do an SMC reset (although I don't see any sign of rather it happened or not)
Does anyone know why the power button would turn the computer off, but won't turn the computer on? This is even though removing the mag safe, removing the battery, and then reconnecting the mag safe power supply does turn the computer on automatically. Once on, the computer appears to work absolutely perfect.
Any help would be greatly appreciated.
hi, i found an old macbook pro a1226 and have not been able to start it up...i plug the magsafe green light turns on then hit power , No response on the screen, however the fans start up inside making noise as if it is on...I have tried without the battery as well...still no response...Any way to help me out would be greatly appreciated...i
Thanks i found out that i was using a 60w magsafe instead of 85w probably i got my mothers one instead. :( i coul eventough start it doing the pressing start button and plugin the 60w magsafe but the funtionalitty was erroneous, no wify no bluetooth shutted down suddenly fans full spin.. Finally i plugged my 85w magsafe and started normally. The battery is dead so im waiting for the new one. I hope that the logic board didnt suffer too much when i booted it with the 60w magsafe. When i booted it normally with the 85w one i noticed that some projects in ableton live werent going as fluid and it seemed like a loose in processor. It also shuted down as if there were cuts in the energy coming from the magsafe. Some kind of weird thing. I hope that everything stabilizes wth the new bat. Thanks for the info in general!