hello. i am just working in that board 820-2914
it is not turning on.
pluging in the macsafe the green light is coming short, then off. After 1,5seconds again short green, off.
I removed F7040and 7041. After that I had a flickering green light
the 12.6V are not stable, coming up then down to 0 and so on
I replaced U7000 2 times. On Q7035 pin 4 pulses are nice
on Q7030 its not stable
U7000 Pin 28/29 is 20Ohm
R7010/7011 is ok, R7051/7052 is ok
Q7080 replaced
I have red probe on ground with a good working board on D7005 Pin1/2 infinity, on this death board I have some like 1.080
Now the intresting:
If I hold the front end of the solder iron on pin 1 of L7030 then I have on Pin 2 L7030 12.54V not changing, green light is constant as well. If I take it back(the solder iron) green is flickering and Pin 2 L7030 is changing from 12.6 to 0.
need help please.
it is not turning on.
pluging in the macsafe the green light is coming short, then off. After 1,5seconds again short green, off.
I removed F7040and 7041. After that I had a flickering green light
the 12.6V are not stable, coming up then down to 0 and so on
I replaced U7000 2 times. On Q7035 pin 4 pulses are nice
on Q7030 its not stable
U7000 Pin 28/29 is 20Ohm
R7010/7011 is ok, R7051/7052 is ok
Q7080 replaced
I have red probe on ground with a good working board on D7005 Pin1/2 infinity, on this death board I have some like 1.080
Now the intresting:
If I hold the front end of the solder iron on pin 1 of L7030 then I have on Pin 2 L7030 12.54V not changing, green light is constant as well. If I take it back(the solder iron) green is flickering and Pin 2 L7030 is changing from 12.6 to 0.
need help please.