I got this board in because it was SOMETIMES turning on, and sometimes not. The device was reaching S0 state, but still not turning on sometimes.
I found almost no liquid damage, apart from two tiny spots. One spot had discoloured a capacitor (C3282), which i replaced even though it wasn't shorted or out of cap. The other spot had ruined a resistor (R8178), and destroyed the trace beneath. This resistor was a 100ohm, and it carried PM_SLP_S3_L, which was getting stuck at one end of the dead resistor. I replaced this resistor and repaired the trace and the problem was totally solved. Computer has been perfect for the past two days.
Today, i came to it and it was totally dead again, won't turn on ever now. It seems to be a new problem because more rails are missing. PM_SLP_S3_L doesn't even exist anymore for example.
I've given the board two thorough cleans through the crest, and i cannot find any other areas of corrosion. Please help!
PPBUS_G3H = 8.57v
PP3V42_G3H = 3.42v
PP5V_S5 = 5.12v
PP5V_S4RS3 =5.12v
PP3V3_S4 = 3.32v
PP3V3_SUS =3.32v
PM_SLP_S4_L = 3.32v
PP3V3_S3 = 0.05v
PP5V_S0 = 0.00v
PM_SLP_S3_L =0.00v
Any support would be greatly appreciated.
I found almost no liquid damage, apart from two tiny spots. One spot had discoloured a capacitor (C3282), which i replaced even though it wasn't shorted or out of cap. The other spot had ruined a resistor (R8178), and destroyed the trace beneath. This resistor was a 100ohm, and it carried PM_SLP_S3_L, which was getting stuck at one end of the dead resistor. I replaced this resistor and repaired the trace and the problem was totally solved. Computer has been perfect for the past two days.
Today, i came to it and it was totally dead again, won't turn on ever now. It seems to be a new problem because more rails are missing. PM_SLP_S3_L doesn't even exist anymore for example.
I've given the board two thorough cleans through the crest, and i cannot find any other areas of corrosion. Please help!
PPBUS_G3H = 8.57v
PP3V42_G3H = 3.42v
PP5V_S5 = 5.12v
PP5V_S4RS3 =5.12v
PP3V3_S4 = 3.32v
PP3V3_SUS =3.32v
PM_SLP_S4_L = 3.32v
PP3V3_S3 = 0.05v
PP5V_S0 = 0.00v
PM_SLP_S3_L =0.00v
Any support would be greatly appreciated.
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