Have this 820-3209. Corrosion around lp8550, pretty bad. Removed LP8550, cleaned corrosion, noticed all pads looked fine but pin 13 was badly corroded and became shitstain. Used boardview to check where it's connected, no net. It doesn't seem to be connected to anything but has designation tp_bkl_fault. Put on the new bga chip anyway, no display, but bcklt does work. (Previously did not, also no display).
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820-3209 no image corroded pad
- Thread starter Rford
- Start date
Have this 820-3209. Corrosion around lp8550, pretty bad. Removed LP8550, cleaned corrosion, noticed all pads looked fine but pin 13 was badly corroded and became shitstain. Used boardview to check where it's connected, no net. It doesn't seem to be connected to anything but has designation tp_bkl_fault. Put on the new bga chip anyway, no display, but bcklt does work. (Previously did not, also no display).
did that not post?
did that not post?
When I turn it on, it makes the dark screen a bit brighter. The apple on the lid lights up as well. It does not display as a white screen. Before I changed the LP8550, it had nothing at all. Now the screen at least gets a little lighter (indicating backlight), and the apple lights up.
Do you have 3.3v on pin 18 & 19 of J9000?
If you run ASD in an external monitor, do you get some displayport symbol error?
Have you tried another screen?
If you run ASD in an external monitor, do you get some displayport symbol error?
Have you tried another screen?
Yes. If any of the traces between CPU & LCD are bad(or knocked off cap inbetween) it'll give a symbol error. If that is not the case, then likely bad screen.