820-00840 Max Fan Speed After Battery Replacement

[CGid]

Have a MacBook that came in for a battery replacement. Device presented just fine overall.
After powering on the system with the new battery installed the CPU fan runs at max speed no matter what.
I've attempted another battery, I've attempted a new CPU fan and also attempted a new Trackpad & Flex Cable. All with no change. Any ideas on what to check next?

 

[2informaticos]

Any error pops up starting in diagnostic mode?

You can also run HWMonitor and check thermal sensors.

 

[CGid]

I got PPF004 from Apple Diagnostics. I'll double check sensors.

 

[CGid]

Airport Proximity and Mainboard Proximity read at 128°C from HWMonitor. Attached is full image of readings

 

[2informaticos]

Inspect for ripped off components near U5870.
Take a look at Q5805 too.

 

[CGid]

No components noticeably knocked off the board near U5870 nor Q5805
CPUTHMSNS_ADDR_SEL (Pin 5) reads about 100 Ohms and is the only pin of U5870 reading low, but checking schematic it seems the R5871 is 100Ohms.

u5870 Diode Readings
1- 0.368
2- 0.369
3- 0.593
4- 0.602
5- 0.109
6- 0.640
7- 0.641
8- 0.642
9- 0.642
10- 0.640
11- 0.640
12- 0.531
13- 0.618
14- 0.000
15- 0.445
16- 0.409

 

[2informaticos]

Test with another battery.
Also test disconnecting webcam, just in case; to discard ALS issue.

Check traces continuity for all Q58xx sensors.

 

[CGid]

I have already attempted a new screen and battery with neither causing any change.
Would new screen still have ALS issue?

 

[2informaticos]

I don't think.
But there should be mechanical damage caused when repplaced the battery.

Just in case, try another TP board/flex.

 

[CGid]

I don't think.
But there should be mechanical damage caused when repplaced the battery.

Just in case, try another TP board/flex.

No visible signs of mechanical damage. I have already tried another TP w/ New Flex.

 

[2informaticos]

I have had (not only once) problems with new chinese TP flex...