sourcensolutionsonline@gm
Member
This macbook came in wet, after cleaning , its powering with image but no backlight , I quickly ran a diode mode reading on the big caps and 1067 which does not show any short , Can I please get some help ?
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Macbook A1707 820-00281 NO Backlight after water damaged
- Thread starter sourcensolutionsonline@gm
- Start date
Post U8400 basic voltages; pins 5, 18, 17, 11.
Did you try known good LCD assembly?
Did you try known good LCD assembly?
sourcensolutionsonline@gm
Member
, U8400
PIN 5 = 5V
PIN 18 = 5V
PIN 17 = 3.28V
PIN 11= 10.91V
NO, I have not tried a good known LCD yet since I can see imagines. on this one.
PIN 5 = 5V
PIN 18 = 5V
PIN 17 = 3.28V
PIN 11= 10.91V
NO, I have not tried a good known LCD yet since I can see imagines. on this one.
sourcensolutionsonline@gm
Member
Let me know what's the next step. sorry my typos , I meant to type Images.
Check R8450-53 and their traces.
Post voltage and diode mode on SCL/SDA lines.
Testing with known good LCD assembly is the best to do.
U8400 gets the backlight adjust from T-CON.
Post voltage and diode mode on SCL/SDA lines.
Testing with known good LCD assembly is the best to do.
U8400 gets the backlight adjust from T-CON.
sourcensolutionsonline@gm
Member
R8450/SCL = 0.466 and 4.61V
R8453 = .0466 AND 5.15V
R8451 /SDA =0.466= 4.5V
SCL = 4.61V
SDA = 4.55V
All traces are no damaged or corroded ic, Resistor or caps all is looking clean .I dont have another lcd to test but i continue to see images with a bright light, let me know what's next please
Thank you.
R8453 = .0466 AND 5.15V
R8451 /SDA =0.466= 4.5V
SCL = 4.61V
SDA = 4.55V
All traces are no damaged or corroded ic, Resistor or caps all is looking clean .I dont have another lcd to test but i continue to see images with a bright light, let me know what's next please
Thank you.
sourcensolutionsonline@gm
Member
Just Cuious, i got a loose A1706 lcd here , I have one test cable do you think the A1706 would be ok for the test? the fpc connector is looking the same as the A1707 I dont know if that would work at least that would give me an idea of whats going on .
sourcensolutionsonline@gm
Member
Just to give you a heads up, in fact the lcd is my issue , I did the test with my A1706 lcd And yes backlight system works perfectly fine.
Then you have a problem with T-CON, or backlight flex/LED strips of your A1707 LCD assembly.
sourcensolutionsonline@gm
Member
can that be repaired or should i just get a whole new screen?
You can at least inspect backlight connector on the T-CON board.
Also may have only flexgate issue; easy to fix.
Also may have only flexgate issue; easy to fix.
sourcensolutionsonline@gm
Member
Really , do you have any tutorial for the flex gate ?
Usually you should note backlight reaction when moving the lid.
If flex is completely broken, may totally lose the backlight.
Youtube is full with flex gate videos; just search.
However, your problem may be different.
If flex is completely broken, may totally lose the backlight.
Youtube is full with flex gate videos; just search.
However, your problem may be different.
sourcensolutionsonline@gm
Member
Ok Thank you very much .