Startup issue - fan OK, HD OK, no chime, no screen, dim led, dvd reads
MacBook Pro 15 A1226 year 2007
Hello,
I just want to please you for help... with strange starup issue.
I didnt find answer so new question... sorry if I just missed it elsewhere.
My MBP 2007 (A1226) was running fine - one day I turned it of and after weekend I was unable to start it - I know.. old machine.. but...
When I plug magsafe . it works - green turns to orange and battery is charging. Wen i press power button - it start up - fan goes on, I can hear HD spin, but no sound (chime) no video (screen remains off), and dvd is trying to read (can hear the laser up and down). Sleep led is dim and stays on.
I tried:
take RAM out - the sleep led started to blink - put RAM back - still the same.
take superdrive out - the sleep led was stil solidly shining but brighter - returned the optical back - again solid led but dim.
Any advise..? I tried to start up with 10sec powerbutton trick - I get full fan speed but no led, no display...
Please - is there any kind of bad thiing I shoul take away and use my mac again?
please let me know, U may send me an email - pavel.doschko@gmail.com
Thank you
Pavel
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3 commentaires
just one thing - may be the problem in backup battery...? (PRAM battery) It may be K.O. ???
par Pavel
With that led changing brightness I would say there is some kind of power distribution problem, could be the battery, could be the power brick, could be a logic board problem like a short in the power IC or CPU so there is not enough power for the entire system at once... that all I can think of
par ETHREAL1
Wel... This could be possible... I dont really have parts to try... Just think it is strange... When i reset smc, the led blinks, stay on and when start continue, just tge problem with boot.., :/ when there is power, would the smc reset work?
par Pavel