820-2850 green light but no power

nate8organic

New member
Im pretty sure this board has a bad isl but i replaced it with one off a donor board but still got only a green light. double checked it was seated nice and it is. im getting 18.6v on pin 2 20ohm res on 27to28 and 3ohm 17to18. i am however getting a continuous voltage drop on pin 1 of the F7040 is there a short to ground there? the res to ground f7040 is .9 ohm on pin 2 and 9.+ ohms on pin 1.

I cant test it with another isl because i do not have anymore 2850 donor boards with the isl still intact. any way i can determine if it is or isnt the isl would really help.

Thanks in advance
Nate
 

nate8organic

New member
i'm getting 5 ohms and dropping on the f7040, the fuse is good but when i measure voltage on the f7040 it starts at about 2v but drops all the way down to .3 and then the meter trips out and jumps up to 300volts and starts dropping.
 

nate8organic

New member
okay i will work on getting a new isl and test it. i tested it with 2 isl and double check the soldering so im pretty sure i dont have a good isl.
 
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