Chosen Solution
Hello, One day as I was busy on the computer I heard a faint pop and ’thought’ I noticed a slight odor. I usually have my sound muted so didn’t notice it audibly. Sometime shortly I found the ‘sound out’ no longer worked. Grrr, I rarely use it but, sometimes I need it. USB sound out works, Bluetooth sound out works. I’ve done a fair amount of Googling and have trashed a couple pref files, played with the mini RCA jack, and a couple other efforts of ‘magic wand’ waving. When a sound should play (sound effect, changed volume, etc) there is a minor, barely noticeable click/pop sound somewhere near the U, I, 8, F8 keys. Another attempt to produce that click/pop will not work till a few minutes later - then the noise can be reproduced. The slight odor (I think) I originally noticed leads me to beleive I have a hardware issue. I’m wondering if anyone here has enough experience ‘under the hood’ who could give me their 2¢ on what may be the case here and maybe the difficulty level of repair? Hardware Overview: Model Name: MacBook Pro Model Identifier: MacBookPro3,1 Processor Name: Intel Core 2 Duo Processor Speed: 2.4 GHz Number of Processors: 1 Total Number of Cores: 2 L2 Cache: 4 MB Memory: 4 GB Bus Speed: 800 MHz Thank you.
Unfortunately there is no snake oil or direct answer to this problem. You are going to need to remove the left in/out board and logic board from the laptop. You can find guides for doing those things here. You are then going to need to take a loupe or stereo microscope and look for obvious burnt parts and/or discolorations (darker areas) on the boards. That will tell you what part(s) have failed. You will then need to take pictures of those things you found to here and/or other forums for someone to determine what the part(s) is/are and the specifications/values. The alternatives are: A number of places on eBay and the web will fix the problem for $250 USD or less. Use the available resources for sound you have.
hi. did you fix it? i have the same problem on my a1151 and i ordered a replacement for the left i/o board. i hope this works, otherwise i’m screwed.
