I have a 1998 imac, and it has a motherboard problem. From what I saw on the internet, this problem is very common in this model, but I don't want to change the board, I want to find out what is causing the problem and fix it. Does anyone have a tip?
Problem: When you turn it on, the light turns amber, never turns green, the coolers turn, and sometimes I hear the "bong", but incomplete, it starts to play the sound and halves. The problem is definitely in the motherboard, because I bought another imac, and inverted the cards to find out if there was a problem in the primary source.
What I've tried:
- Change the processor
- Change memory
- Cleaning
- pram Battery replacement
- Reset PMU
Until some time ago, if I held the reset button for 60 seconds (which is on the side next to the USB connector), it would start up and function normally (until I shut down or restarted). I suspected that this could be some capacitor, because I thought, if it turns on when holding the reset for some time, it may be the time needed to charge some capacitor that is not very good. I looked at the boardand found nothing visually damaged, and before leaving unsoldering everything from the board, I decided to create this post.
I also have a lombard powerbook WITH THE SAME SYMPTOM, so I believe that the defect of one is the same as the other.
Problem: When you turn it on, the light turns amber, never turns green, the coolers turn, and sometimes I hear the "bong", but incomplete, it starts to play the sound and halves. The problem is definitely in the motherboard, because I bought another imac, and inverted the cards to find out if there was a problem in the primary source.
What I've tried:
- Change the processor
- Change memory
- Cleaning
- pram Battery replacement
- Reset PMU
Until some time ago, if I held the reset button for 60 seconds (which is on the side next to the USB connector), it would start up and function normally (until I shut down or restarted). I suspected that this could be some capacitor, because I thought, if it turns on when holding the reset for some time, it may be the time needed to charge some capacitor that is not very good. I looked at the boardand found nothing visually damaged, and before leaving unsoldering everything from the board, I decided to create this post.
I also have a lombard powerbook WITH THE SAME SYMPTOM, so I believe that the defect of one is the same as the other.
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