5
Score
Luci
61
Asked
Fans bumping not spinning not powering on
I replace the lower case, everything went smooth, but now when I hooked up the battery and hit power the fans just bump and do nothing... I hook up the power supply and the fans bump constantly. I get a green light on the power supply, the battery is at 3 lights but won't charge... I replaced the I/O board and the same issue. I reset the SMC and tested the jumper on the logic board for the power bypass... fans respond same. Is this a logic board problem now? Any help is appreciated.
Update
Hey Ralph thanks for the idea... stripped the computer down again and checked the fram rib and double checked the screws as you suggested... got all the right one in the right place and not ripped down tight, didn't see any dents in the lower case to show the screws touching. Same issue persists.
Can't see it moving in a pic, but that green light is with a battery with only 3 lights. Thanks again.
1
Score
rj713
39.6k
Answered
Hi, I would go back over the lower case replacement looking in particular at screw lengths. Sometimes if you get one wrong you can short out a process. Ralph
Download Coconut Battery and see how much charge the battery will actually take: http://www.coconut-flavour.com/coconutba...
1
Score
palokiller
1.7k
Answered
ahem
had the same problem.
what i would try in your case, unplug that small ribbon cable off motherboard, the one connecting superdrive...
if laptop turns on, its faulty ribbon and you need to replace it. if it doesnt turn on, then...
well, worth trying...
0
Score
Answered
Hi,
I have a Macbook Pro that experiences exactly the same issue.
- MagSafe working (green light)
- Fans bumping with stable frecuency
- Power button does nothing except make the funs bumping a little bit faster.
- MBP Doesn't do anything, no startup, no sound, no hdd start, no Superdrive start, nothing
What i did:
1- Before opening the topcase, the MBP was starting up and booting OS correctly (but with a display failure)
2- Removed the Battery and Memory cards
3- removed all the screws to open the Topcase
4- Removed the topcase without issues
5- Try to turn on to see how the Fans run and internal parts run -> NO Startup anymore!!!!
What I have tried:
- Reset the PRAM
- Reset the SMC
- Review all the cables on MB
Nothing helps.
Note: My Battery is completely dead. I don't know if this it's needed to make some of the resets.
I can't understand why just with the opening, its not more starting up?
Luci, did you find the solution?
Zjef
Sorry for the delay in my answer. In my case I had done a full lower case replacement. My issue was bad ribbon cables, the ones connecting the I/O board to the logic board was not sitting flush. fixed that issue but the right fan still didn't spin, so I unhooked the DVD player and then the right fan spun and the machine booted up. If you are getting a green light on your charger with your battery dead then power is not getting past the I/O board. Wondering is something came lose when you pulled the top case off.
Luci,