Re: A2289 Board 820-01987-A Dead?

Hi, same issue with ultrasonic cleaning

Re: A2289 Board 820-01987-A Dead?

I have an ultrasonic cleaner, I will try. What temperature and time settings do you recommend ?

Re: A2289 Board 820-01987-A Dead?

Yes joutrade 5,12V present on L8504 (pin 1 and pin 2)

Re: A2289 Board 820-01987-A Dead?

Hi momoomar, unfortunately not. I left it out for now waiting a real boardview.. But maybe you can help me.
Could you please tell me what voltage you get on the testpoint (beside J8401) with the red arrow on the photo and also diode value when board is disconnected from power ?

Thanks

PS: If U7420 is blown you should try to replace it...

Hello all,

I have a 820-01987-06 Logic board to repair, does anyone know what the testpoint is connected to at the red arrow on the picture ? It is completely destroyed.

Thank you for your kind responses...

Re: A2289 Board 820-01987-A Dead?

Hi,

I have same Logic Board to repair (820-01987-06) and have 20V with 48mA which stays stable to this value. I can feel CPU warming but I have no image on the LCD and not on external display anymore. The LCD is ok, I have tested it with a working board.

I have noticied if the TrackPad is not connected, there is a current consumption (max 0,62mA) and drops to 0 after few seconds. That's why I'm asking me if this board needs the to communicate with TrackPad to be able to boot.

I retrieve similar resistance...