820-2914 Fan on high Speed & slow.

[Don Anton]

Hi,

This is not a liquid dmg board. How ever ASD test failed on (TG)D)- GPU Die, (TG)P)- GPU 0 Proximity, Fin Stack , Right Fin stack, Palm Proximity as bellow photo.
U 5550, 1, 7,8,9,10 has 3.3V. I replaced the SMC still same boot to the OS but very slow and fan on high speed.

Any help greatly appreciate.

 

[2informaticos]

I don't see Palm Proximity in the photo.
But if is the case, then try known good trackpad board and flex.
Such sensor is embedded in the trackpad circuitry.
Also check continuity between U5550 and corresponding sensors, Q5501/03.

 

[JohnB8812]

Going to have a dead GPU tomorrow as well so be ready

 

[Don Anton]

Hi, Check with known woking body same result. traces between U5550 to Q5501/03 are good. Replaced Q5501/03 and C5552. same result. any clue?

 

[2informaticos]

Try disconnecting airport card and camera.

 

[Don Anton]

I did
I just connect only key b and track pad still same

 

[Don Anton]

YOu recon FIn stack left and right proximity failed due to GPU Die and GPU 0 proximity failing or any other reason?

 

[2informaticos]

Any device connected on the same SMBus can generate the same problem.

 

[Don Anton]

SOLVED. As GPU Proximity/GPU Die/Left Heat Pipe/Right Fin Stack controlled by U5550, I replaced U5550 . Bingo. ...Thank you very much for your support. Until I trouble you again take care.