MacBook Pro A1229 doesn't start - what to do?
So I thought I had got a bargain in 17" A1229 model mac pro, which ran fine till a week, then I started having issues.
Sorry for my long post but I think giving whole history only can make someone figure out the pattern, because I can no longer derive anything from what's happening.
1- Firstly, the screen just went blank when it was ON (may have sleeped). Then after several failed keystroke attempts, I gave it to Apple care guys - and they said they can't fix it - according to them only the logic board was to blame because they had tried everything else. And they had no replacement as it was 2007 vintage category now.
So took it back home, kept it on magsafe (ON) for about 2 hours. Then I randomly pressed Cmd+Shift+Power, and it started with a bang sound, with display and everything!
2- It ran for next two days, then again, same issue started. (when shutdown, I keep it POWERED OFF, even the adapter is out of outlet). When I attached the magsafe and powered it on, only the white front light lit up. No bang sound.
After that I read up this one, and gave it a try. The result?
- Bang sound came
- White light
- No screen yet
- Fan started with high velocity
I turned it off, and on again, and same result.
Sometimes I will plug out the power completely, and when I turned back ON, it would light up the keyboard, would respond to keystrokes and all. Sometimes it will make the bong sound, sometimes not. I keep trying resetting SMC, keep resetting PRAM and keep POWERING ON & OFF, but I keep getting different combinations of:
- white light, no bang
- no light, but bang
- white light, and bang both.
- keyboard light up / no keyboard lights
But no display yet!!! I see no sound of HDD too. And no, Apple care turned out to be more incompetent than my own effort, as you can see above.
What is happening? Has it anything to do with temperature? Is it cooling too much or heating too much? I am sure all components are OK and it just has something to do with power so I want it back anyhow.
Es esta una buena pregunta?