Hi everyone,
I am trying to repair my iMac A1312 late 2009 intel i5.
First of all it was booting but no screen on internal lcd but working with external one,
I tried:
- another screen and led power board (booting no screen - same as before)
- another mxm graphic card (not booting missing 3rd led)
* screen and mxm gpu tested are 100% working on another A1312 iMac.
I putted back the original mxm graphic card and what a surprise, now it's not booting anymore even with the stock parts.
The main problem on this motherboard was a burnt inductance located around the lvds connector (L9000). I have changed it but I can't test my repair since I have tried to swap MXM GPU and putted my logicboard in bad mood.
I took some measurement on the board and everything seems ok, graphic card is powered on and so on.
Could it be related to PRAM ?
Do there is any way to reset PRAM except from the usb keyboard ?
Hope you can help me or have any idea I can dig into.
Best regards,
I am trying to repair my iMac A1312 late 2009 intel i5.
First of all it was booting but no screen on internal lcd but working with external one,
I tried:
- another screen and led power board (booting no screen - same as before)
- another mxm graphic card (not booting missing 3rd led)
* screen and mxm gpu tested are 100% working on another A1312 iMac.
I putted back the original mxm graphic card and what a surprise, now it's not booting anymore even with the stock parts.
The main problem on this motherboard was a burnt inductance located around the lvds connector (L9000). I have changed it but I can't test my repair since I have tried to swap MXM GPU and putted my logicboard in bad mood.
I took some measurement on the board and everything seems ok, graphic card is powered on and so on.
Could it be related to PRAM ?
Do there is any way to reset PRAM except from the usb keyboard ?
Hope you can help me or have any idea I can dig into.
Best regards,
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