Replaced the Logic Board and the left i/o board - now what?
No startup chime, no video, solid sleep LED, optical drive makes noise, and after staying on for a while, the part underneath the F keys gets hot.
I had a question about this same problem, and it was suggested the i/o board may have been the culprit, so I replaced it. Both the LB and the i/o board were brand new - not used or refurbished.
I followed the instructions here to the T, but I am just lost - I don't have the knowledge to know what to look for or troubleshoot beyond the obvious things I've read about.
Could it be bad wires? connectors? if my Fans were not working, could it cause the MBP to fail the POST?
Thanks!
Ist dies eine gute Frage?
7 Kommentare
Nothing? Any ideas guys?
von jerrywickham
There's nothing to give a diagnosis with. "I had a question about this same problem" what's that?. KISS Start all over and give the basics. Start with the light on the AC adapter. Nobody gave an answer because of your approach. Just tell us what's happening and your machines history. Sorry to be so blunt.
von mayer
Sorry Mayer, I started another question when this first happened and received a lot of help and insight and advice. But it turned out (evidently) my problem is not what I and others thought it might be. So I decided to start up an new question.
About a month ago - my MBP was working just fine. I brought it home from work on day, pressed the power key - but all I got was a solid LED sleep light, no startup chime, no video to the display, no other noises other than the optical drive was spinning (I have a disc in it). The light on the AC adapter is the amber color - but once the battery is fully charged, changes to green, as usual. If left "on" in this state, the area beneath the F-keys gets very warm - as if the processor is working, but you don't hear anything - no fans, nothing other than the optical drive. I have to push the power button to turn it off again.
von jerrywickham
If I hold down the power button and keep holding, after 6 secs the LED light blinks several times and then goes off again - but you can still hear the optical drive spin.
It was suggested that I might have a bad Logic Board, so I installed a brand new one using the guides on this site, and it still exhibited the EXACT same symptoms. So, I posted a question about that here on this site and that is where I got the help I referred to above.
It was suggested there that instead of a bad LB, my left i/o board might be the culprit. So I installed a brand new one and again (keeping the new LB in the computer as well) - the EXACT same symptoms as before. NO CHANGE.
I checked for burned wires, bad connections, or anything that appeared to be damaged, but honestly, I don't know enough about this to even be able to tell if something has gone bad.
I can follow directions well, but diagnosing beyond the obvious is something I am not gifted with.
This is all the info I can think of to report.
Thanks
von jerrywickham
Oh yeah - I did try to zap the PRAM and other easy solutions, but since this is not passing the POST, I don't think that would have done much anyway.
von jerrywickham
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