820-2914 sensor issues

[Kyle93]

820-2914 powers on but fans spin fast. Also the battery does not charge. Ran ASD and received several SMC IO errors. Already replaced SMC. What to check next?

 

[2informaticos]

AnY history available, liquid signs?
Post exact PPBUS_G3H voltage.
Also diode mode and voltage for SCL/SDA lines of battery bus; w/ and w/o battery connected.

Check traces and solders around U5570.

 

[Kyle93]

yes this has been messed with before. Wrong GPU soldered at moment 216-081005 instead of 216-0810084 but plan on changing to correct NEW GPU before giving back. No liquid signs but glue removed from mux and PCH but do not think these are the issues since it boots into OSX just very slow.

PPBUS_G3H 12.60V

diode mode SCL/SDA 0.488 0.488 w/o battery connected 0.441 0.431 w battery connected

voltages SCL/SDA w/o battery connected 3.480v 3.480V voltages w battery connected 3.475v 2.105v

U5570 area is in perfect shape

 

[2informaticos]

Battery is bad.

Try known good TP board/flex.
Also test it without camera connected.

 

[Kyle93]

TP currently works in ASD and OSX, how can it be bad then?

Disconnecting camera does not make a difference

 

[2informaticos]

TP has temp sensor embedded.
I didn't say TP is bad!

Camera connector is shared by ALS sensor too; which connects on the same I2C bus with temp sensors.