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macintosh portable not working

godfatherq8

Member
I just bought a macintosh portable thats from Ebay but it is not working I want to repair it can you please tell me where to start. a step by stem what to do and what need to be change and check? I have a new 6V 4.5Amp lead batter and new 9v backup battery but still not working(no power up, no sound). So what I have do to next change what the capacitor or wash it or what ?

 

Johnnya101

Well-known member
I recommend the following:

- Recap and wash (multiple times if goo is present) the logic board

-TEST THE BATTERY and confirm the voltage is where it needs to be

-TEST THE CHARGER and confirm its outputting the correct voltage (Needs to be correct white brick)

Dont be like me and forget to install the battery door! It presses down on a switch.

You should get something out of it once these steps are done. TechKnight the pro will probably help you out once the recap is done.

 

ScutBoy

Well-known member
Assuming all of the above is done, you may need to press the reset and interrupt switches (left side "under" the keyboard) at the same time for 5-10 seconds. This is called out in the Portable service manual, which is available on-line.

Battery charge is important. Mine won't reliably start up if the battery voltage is below 5.75 or so, even if the A/C is plugged in.

But really - the big thing you need to do is recap and wash the board, and make sure there are no bad traces.

 

godfatherq8

Member
I recommend the following:

- Recap and wash (multiple times if goo is present) the logic board

-TEST THE BATTERY and confirm the voltage is where it needs to be

-TEST THE CHARGER and confirm its outputting the correct voltage (Needs to be correct white brick)

Dont be like me and forget to install the battery door! It presses down on a switch.

You should get something out of it once these steps are done. TechKnight the pro will probably help you out once the recap is done.
is there are any special wash method or chemical need to be used ?

 
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