Got this model from my friend who couldnt get it to work and repair cost too much.
Symptoms:
- Fan working, hdd spinning, external dvdrw working, charger light green and normal beep sound when booting up.. but kinda slow bootup.
- After beep either flashes white for second and then turns black with some degree of brightness, 2nd option it turns full white without apple logo or anything.
- SMC bypass or restart/ pram restart does nothing. SMC bypass just makes fan go 100% speed and same symptom.
-Somewhat worked few weeks ago, could boot to single user mode, it recodnized hdd and install disc on external dvdrw.. but couldnt install it.. kernel panic before it could load anything when i press disc.
Tried:
-SMC bypass, pram reset, cleaning board with alcohol and brush and swap thermal paste, no corrosion or liquid spill signs only slight burn marks on few places, should be normal. Reseated everything couple of times, also no component seem to be missing or bulging.
- swapping ram sticks and slots, without ram gives normal beep beep beep no ram detected, and when i put stick on slot2 it gives same error so it isnt working. Recommended pc3-8500 is not working somehow, and i got this far by using pc3-10600 ddr3 ram stick on slot1.. only this way i can boot it to white screen.
- dont have another charger to test but im using pretty new 60w magsafe with L-shape connector
-External monitor plugged in i get white screen / black screen so no issue on lcd
I tried 3x baking / heat gun method on some below 50$ mobos and that never worked for me.. could it be issue is somewhere else than graphics card? thats my last choice to start trying this baking/heatgun method again.
I have cheap digital multimeter and a1278 schematics.. but im total noob with measuring voltages etc, any suggestions?
thx in adv
edit: actually my charger seems to have T-shape and not L-shape. But it seems to fit it perfectly still. Gonna get L-shape connector cable in few days to test it though.
Symptoms:
- Fan working, hdd spinning, external dvdrw working, charger light green and normal beep sound when booting up.. but kinda slow bootup.
- After beep either flashes white for second and then turns black with some degree of brightness, 2nd option it turns full white without apple logo or anything.
- SMC bypass or restart/ pram restart does nothing. SMC bypass just makes fan go 100% speed and same symptom.
-Somewhat worked few weeks ago, could boot to single user mode, it recodnized hdd and install disc on external dvdrw.. but couldnt install it.. kernel panic before it could load anything when i press disc.
Tried:
-SMC bypass, pram reset, cleaning board with alcohol and brush and swap thermal paste, no corrosion or liquid spill signs only slight burn marks on few places, should be normal. Reseated everything couple of times, also no component seem to be missing or bulging.
- swapping ram sticks and slots, without ram gives normal beep beep beep no ram detected, and when i put stick on slot2 it gives same error so it isnt working. Recommended pc3-8500 is not working somehow, and i got this far by using pc3-10600 ddr3 ram stick on slot1.. only this way i can boot it to white screen.
- dont have another charger to test but im using pretty new 60w magsafe with L-shape connector
-External monitor plugged in i get white screen / black screen so no issue on lcd
I tried 3x baking / heat gun method on some below 50$ mobos and that never worked for me.. could it be issue is somewhere else than graphics card? thats my last choice to start trying this baking/heatgun method again.
I have cheap digital multimeter and a1278 schematics.. but im total noob with measuring voltages etc, any suggestions?
thx in adv
edit: actually my charger seems to have T-shape and not L-shape. But it seems to fit it perfectly still. Gonna get L-shape connector cable in few days to test it though.
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