ytesfay80
Member
I have an 820-2850 board. The customer told me there was a liquid spill a long time but they cleaned it up and it was working for a long time until it stopped turning on one day.
When I plug in the charger I get a green light but no fan spin or anything. I removed the board from the machine in order to test the power rails.
PPBUS_G3H - 12.59v
PP3v42_G3H - 3.4v
SMC_RESET_L - 3.4v
SMC_ONOFF_L - 3.4v
PM_PWRBTN_L - 3.4v
The current sensing pins on u7000 all measured properly.
PP5V_S5 and PP3v3_S5 are both present
PP5V_S3, PP3v3_S3 and the S0 rails are missing
I checked U7201 and these are some of the voltages I got.
Pin 1(ENTRIP1) - 0v
Pin 6(ENTRIP2) - 0v
Pin 4(TONSEL) - 4.96v
Is this an issue with the TPS51125?
When I plug in the charger I get a green light but no fan spin or anything. I removed the board from the machine in order to test the power rails.
PPBUS_G3H - 12.59v
PP3v42_G3H - 3.4v
SMC_RESET_L - 3.4v
SMC_ONOFF_L - 3.4v
PM_PWRBTN_L - 3.4v
The current sensing pins on u7000 all measured properly.
PP5V_S5 and PP3v3_S5 are both present
PP5V_S3, PP3v3_S3 and the S0 rails are missing
I checked U7201 and these are some of the voltages I got.
Pin 1(ENTRIP1) - 0v
Pin 6(ENTRIP2) - 0v
Pin 4(TONSEL) - 4.96v
Is this an issue with the TPS51125?
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