820-3437 Liquid Damage


New member
Hi Guys, I have a liquid damaged 820-3437, liquid around U1900. Trace from C1910 to U1900 was burned so I made a new line. GOt arange and green light, fan spins for a few seconds and stops. CPU gets warm. Below all readings. The rest of the board all looks OK, also near U1950 and SMC. Suggestions?

PPBUS_G3H = 8.6
PP3V42_G3H = 3.42
PP5V_S5 = 5v
PP5V_S4 = pulsing 0-5v
PP3v3_S5 = 3.34
PP3v3_S4 = 3.34 pulsing
PPVCC_S0_CPU = pulsing
ALL_SYS_PWRGD = pulsing
PM_S0_PGOOD on U1950 = pulsing
SMC_LID = 3.42
SMC_ONOFF_L = 3.42
SMC Adapter Enable = 3.33 pulsing


New member
No its powercycling, its a bit more then 2 seconds i counted 4 and then it stops. So it looks like the 3 x spin before boot, but it keeps doing that it does not turn off and doesnt boot either. As mentioned CPU gets hot so that seems to work.

PS sorry for the slow reply im working a number of other boards at the same time and this one is a no rush job :).