Post voltage for pins 4, 6, 7 of J9000.
Check trraces/solders at J9000 and connector itself.
Be sure L9010/11 are OK.
Check trraces/solders at J9000 and connector itself.
Be sure L9010/11 are OK.
-
For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.Subscribe Now
820-3330 no lcd
- Thread starter Melamanti
- Start date
Resistance to ground pins 6 & 7; diode mode, red probe to ground.
Check R9010...
Measuring R9010/11 onboard, you must get similar reading.
Check integrity of LVDS_DDC_DATA trace.
Check integrity of LVDS_DDC_DATA trace.
Ok i got something, i got some flux on the lvds connector, did some cold joints, now i got 3.3v on pin 7.
But still no image, pins 38-39-40 of j9000 got 0v. fuse seems fine , led drive on the other hand not so well, should just change all of that just in case?
Would really love to get something out of this though.
Knowledge wise ofc, because if i do change all of it i wont have the information needed.
But still no image, pins 38-39-40 of j9000 got 0v. fuse seems fine , led drive on the other hand not so well, should just change all of that just in case?
Would really love to get something out of this though.
Knowledge wise ofc, because if i do change all of it i wont have the information needed.
Any voltage at pins 2/3?
LCD must be connected.
LCD must be connected.
The strange thing is that pin 3 has 3.3v but L9000 has no voltage, c9002 nothing as well, traces from pin 2-3 to those are fine and they have continuity. I m getting the urge to send this in the garbage pile but this was brought on some sort of "warranty". Any ideas are welcome.
Shouldn't be GPU issue, as external monitor is always driven by GPU.
"I even shorted the 2nd and 3d pins and the 2nd one still doesnt have 3.3v."
You did something wrong.
If both pins are tied together, cannot get different voltage.
Use boardview and identify the pins correctly.
"I even shorted the 2nd and 3d pins and the 2nd one still doesnt have 3.3v."
You did something wrong.
If both pins are tied together, cannot get different voltage.
Use boardview and identify the pins correctly.
That was my problem as well, but after some close inspection on the board, i found out that L8608 was missing, i put one there from a donor board and the machine booted up and is working properly.
So it wasnt a matter of lcd connector, or doing something wrong. The voltages were the ones i described even though it made absolutely no sense. Anyhow, we can count this one as solved and hopefully it will help someone with the same issue. That L8606 is right in the middle of the board and apparently if you are not the one disassembling the machine, things can get knocked off.
Thank you for all your help.
So it wasnt a matter of lcd connector, or doing something wrong. The voltages were the ones i described even though it made absolutely no sense. Anyhow, we can count this one as solved and hopefully it will help someone with the same issue. That L8606 is right in the middle of the board and apparently if you are not the one disassembling the machine, things can get knocked off.
Thank you for all your help.