820-2914-b

[menatwork]

Hi Guys!
I just got another Board for fix and i need find out what happen with PP5V_S0 rail.
When i inject 5V on the rail the fan spinning
I don't get 1.1v in PPVCORE_S0_CPU.

 

[dukefawks]

History? Liquid?

 

[menatwork]

Just stop one day.

 

[dukefawks]

Need more info. PPBUS at 12.6v? 3v3_s5 present? Green light?

 

[menatwork]

Yes, i have both.

 

[dukefawks]

Come on man, give me some more info than that!

 

[menatwork]

PPBUS_G3H - 12.61
PP3V42_G3H - 3.42V (green Light)
PP5V_S0 - 0V
3v3_s5 - 3.33v
PP5V_S3 - 0V
PM_SLP_S4_L - 0V

- Resistance to ground in PP5V_S0 = 3.700KΩ
- No light on the mouse
- When i inject 5v, the fan start spinning, but the CPU won't turn on (no hot)
- When i plug the battery, fun dont spinning, but CPU/VIDEO turn on (hot)
- Original Charge 85W

 

[menatwork]

dukefawks larossmann

 

[dukefawks]

SMC_ADPAPTER_EN high?

 

[menatwork]

dukefawks SMC_ADAPTER_EN / Q7920 = 3.42v

 

[menatwork]

​dukefawks larossmann

 

[menatwork]

​dukefawks larossmann I just keeping waiting for your advice, guys. If u need more information about the board, let me know, please.

Thank you

 

[menatwork]

​dukefawks larossmann

 

[dukefawks]

Check voltages after R1800,1,2,3. Check 32Khz on pin 12 of U2800.

 

[menatwork]

dukefawks I check the voltage on R1800/01/02/03 and then i get 3.32v
About U2800, i can't bc i don't have oscilloscope.

 

[menatwork]

​dukefawks larossmann

 

[dukefawks]

Wait, when you plug in a battery the CPU/GPU get warm and these is no 5V_S0??

 

[larossmann]

Is PLT_RESET_L stuck at 0v? Also, duke's question.

 

[menatwork]

Yes, i Get 0V on PLT_RESET_L (U2890)

 

[menatwork]

Like i said: I just get 5V_S0 when i plug the battery. Just charge, no.