modesto1993
New member
Hi everyone, these days are hellish, there seems to be a general death of MacBooks, the one I'm analyzing today always has 5V on the PP20V line and nothing else, no liquid, no shorts on most of the lines I've analysed.
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820-01958 only 5V no power
- Thread starter modesto1993
- Start date
Which basic voltages appear on the board?
modesto1993
New member
No 12V, no 3V, all the lines don't seem to be powered
Could the U7000 be faulty? PPBUS_G3H I have 0V
Could the U7000 be faulty? PPBUS_G3H I have 0V
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Difficult to help, if you don't provide useful information!
What is the voltage for PPBUS_G3H and 3V3_G3H_RTC?
If nothing, then check in diode mode.
What is the voltage for PPBUS_G3H and 3V3_G3H_RTC?
If nothing, then check in diode mode.
modesto1993
New member
All 0V, I corrected the back post above because I didn't remember the names of the lines I had checked. I think the problem could be U7000 but I'm waiting for your expert opinion.
"If nothing, then check in diode mode"
???
???
modesto1993
New member
PPBUS_G3H and 3V3_G3H_RTC?
At least...
modesto1993
New member
PPBUS_G3H in short
Update: C6961 is in short, now I have 12V on ppbus
Update: C6961 is in short, now I have 12V on ppbus
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What about 3V3_G3H_RTC now?
I suspect R6961 is burnt...
I suspect R6961 is burnt...
modesto1993
New member
yes, I had already dedicated myself to this resistor, with the tester measuring 0.18 ohm.
3V3_G3H_RTC is 0V but I didn't replace C6961, I diden't know if this could be the cause even if I see that it is a capacitor connected in parallel to others.
Update: I soldered a new capacitor and it works fine now. Problem solved!!!
3V3_G3H_RTC is 0V but I didn't replace C6961, I diden't know if this could be the cause even if I see that it is a capacitor connected in parallel to others.
Update: I soldered a new capacitor and it works fine now. Problem solved!!!
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The problem is not C6961.
Did you check diode mode at L6960?
Did you check diode mode at L6960?
modesto1993
New member
Sorry, I didn't see the answer and I had updated my previous post, with the new capacitor everything worked! Thanks for the support 
