820-3115 slow and mouse lagging, liquid damage

[Gustavo Gomes]

I’m working on a 820-3115 that had some minor liquid damage, already changed sensor on pbus vp0r and some bad looking components on this region.

Fans are running a bit higher than normal and it’s sluggish and beach balling for everything.

what would be normal readings for PBUS VP0R?

ASD EFI not showing any errors too

 

[dukefawks]

Working battery connected? EFI reporting no errors with and without charger connected?
Look up sensor readings for VP0R and VD0R in the ASD hardware profile.

 

[Gustavo Gomes]

Any toughs on this? It sometimes show some errors on ASD about palmrest sensor and ambient temperature, but last time wasn't giving any errors

 

[TCRScircuit]

Any toughs on this? It sometimes show some errors on ASD about palmrest sensor and ambient temperature, but last time wasn't giving any errors

Q5480 and U5410 are super common areas for liquid to hit. Any liquid in the SMC area? Intermittent errors I would think crap under the SMC

 

[dukefawks]

Need the exact sensor name like TA0P, also the error reading high/low or IO error. It could very well be crap under the SMC.

 

[Gustavo Gomes]

Errors on EFI ASD:

TA0P ambient air- SMC IO failed
TC0P cpu proximity- SMC IO failed
TM0P memory proximity- SMC IO failed
Th1H fin stack test 1- SMC IO failed

Errors on OS ASD:

Chipset: Dmi Error Check - PCi driver IOServices open error
TA0P ambient air- SMC Cannot read sensor
TC0P cpu proximity- SMC Cannot read sensor
TM0P memory proximity- SMC Cannot read sensor
Th1H fin stack test 1- SMC Cannot read sensor
SATA Pci Register Test- Pci Driver IOServices open error

 

[dukefawks]

U5511 issue. Check power to chip, R5510 suspect. Corrosion around/under U5511?

 

[Gustavo Gomes]

Changed U5511 just in case, no corrosion around or under.
It gest its 3v.

Now it wont get backlight, working on this now and get back

 

[aprendiz]

diode mode on both data lines from U5511 (pins 9-10)

 

[Gustavo Gomes]

PIn 9 665
pin 10 669

 

[dukefawks]

Voltage on pin 1,7,8 of U5511, if all 3v then ok. It could also be crap under the SMC or dead SMC. Reflow SMC first with some flux and about 150C, do not melt the solder. Just heat it up to clear the crap under the SMC.