Never reused from other iMac.
BTW, be sure isn't "C" version...
BTW, be sure isn't "C" version...
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[help]Imac 21,5 EMC 2428 Dead
- Thread starter phantom
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is it ok?
Yeah...
i've dismantled the motherboard for the first time, changed u7700 with a brand new..now i have this voltage
12, 5, 5, 5 3,3 3,9
on l7750 i have 0v on both sides
0.144 mv in diode mode
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If all solders are good for sure, then check all surrounding components from 5V side.
Do you still get 3.3V at L7710?
Do you still get 3.3V at L7710?
Yeah, all the components related with U7700 and its 5V power supply.
5V power supply is enabled (pin 24).
"0.144 mv in diode mode"
What this means?
I repeated many times on the forum, do not post "V" (nor mV) after diode mode reading.
Post the resistance to ground in ohm scale.
"0.144 mv in diode mode"
What this means?
I repeated many times on the forum, do not post "V" (nor mV) after diode mode reading.
Post the resistance to ground in ohm scale.
Compare reading with the other board you have.
Do it in diode mode and ohm scale too.
Do it in diode mode and ohm scale too.
How not short at pin 1, if is connected on the same line?
Broken trace?
Remove R6970 and check again in diode mode.
U6900 and U9120 are the next suspects.
Broken trace?
Remove R6970 and check again in diode mode.
U6900 and U9120 are the next suspects.
Post again U7700 basic voltages...