820-2533, no 5V_S3 .

[Ryanlen2]

Minor liquid damage around U7100


PPBUS - 12.56V
PP3V42 - 3.414V
PPBUS_CPU_IMVP - 12.56V
PPDCIN - 16.58 - 16.85V

U7201

Pin 16 - 12.56V
Pin 1 - 0V
Pin 6 - .734V
Pin 13 - 3.16V

Q7210

Pin 2 - 3.25
Pin 5 - 0V

Missing PM_SLP_S3_L & PM_SLP_S4_L... MCP not working?

Diode mode
PM_SLP_S3_L - .501
PM_SLP_S4_L - .484


Schematic is a little confusing, U7201 references PP5V_S5 but "Power Aliases" doesnt mention PP5V_S5 nor does board view at U7201. Im assuming its really referring to PP5V_S3.

Thanks. Have a good one.

 

[dukefawks]

Are you shorting the power pads? These do not auto power on.

 

[Ryanlen2]

Shorting pin 5 on J5713.
I have .007V on PM_SLP_S3_L & .003V on PM_SLP_S4_L measured on pin 4 of U9480 and pin 1 of R4690.

Thank you.

 

[dukefawks]

Resistance to GND on PP3V42 line?

 

[Ryanlen2]

Hey Duke.
I have 3.124 K Ohm on PP3V42

Thanks

 

[dukefawks]

That is way too low. Try measuring with polarity the other way, it must go at least over 15K.

 

[Ryanlen2]

25K with polarity reversed (black on ground, red on pin)

Thanks Duke.

 

[dukefawks]

3V present at L7260? ADAPTER_EN present? Checked rails for shorts?

 

[Ryanlen2]

0.001V on L7260
3.396V on ADAPTER_EN



PPBUS_CPU_IMVP_ISNS - 21.50 kOhm
PPDCIN_S5 - 36.90 kOhm
PP3V42-G3H - 25.33 kOhm
PP5V_S3 - 13.41 kOhm
PP5V_S0 - 14.50 kOhm
PP3V3_S5 - 401.5 Ohm
PP3V3_S3 - 3.926 kOhm
PP3V3_S0 - 3.658 kOhm
PP1V05_S0_MCP_PEX_AVDD - 126.9 Ohm
PP1V05_S0_MCP_SATA_AVDD - 126.9 Ohm
PP3V3_ENET - 1.771 kOhm
PP3V3_FW - 12.32 kOhm
PP1V8_S0 - 18.27 kOhm
PP1V5_S3 - .791 kOhm
PP1V5_S0 - 207.8 Ohm
PP1V05_S5 - .559 kOhm
PP1V05_ENET - 428.6 Ohm
PP1V05_S0 - 126.3 Ohm
PP1V05_S0_MCP_PLL_UF - 280.7 Ohm
PP1V05_FW - .464 kOhm
PPVCORE_S0_CPU - 55.0 Ohm
PPVCORE_S0_MCP - 3.6 Ohm
PPVTTDDR_S3 - 6.21 kOhm
PP0V75_S0_DDRVTT - .616 kOhm

Wasnt sure which rails you wanted, so you got all of them.

Thanks Duke.

 

[dukefawks]

No 3V on L7260 so missing 3v3_s5 which one of the basic tests. G2_EN even present?

 

[Ryanlen2]

3.158V on SMC_PM_G2_EN. I know, I had 3v3_S5 at the time of first post.

Thanks.

 

[dukefawks]

G2_EN is enabling the 3v3_s5. Look at diagram how this works and check again if 3v3_s5 is missing.

 

[Ryanlen2]

Yes, 3V3_S5 is missing. Measured on pin 1 R4212. I do have G2_EN (pn 13), but only .722V on 3V3_S5 ENTRIP (pn 6). So I wont get 3v3_S5.

 

[dukefawks]

.7V on ENTRIP is what it is supposed to be. If there is no short on 3v3_s5 it look like a dead U7200.

 

[Ryanlen2]

Hey Duke.
Noticed pin 20 on U7100 was a bit burnt. So I replaced it, along with C7196, C7126 and R7120. I would have replaced the FETS but I do not have a donor for this. Is there another board that uses these I can pull themm from? I also replaced U7200 for the second time.

I Now have 3v3_s5. Also have 1 fan spin when I press power button.
While the fan spins I briefly get PM_SLP_S3 and PM_SLP_S4 at 3.3V. Im still not getting PP5V_S3. Here is a vid of what happens on PP5V_S3 when I press the power button.

---------> https://photos.app.goo.gl/Y30RVWbDHSRrT85C2

Thanks Duke. Have a good one.

 

[dukefawks]

PP5V_s3 must be present if SLP_S3 is there. Is it shorted?

 

[Ryanlen2]

It shows up for s sec. Like 4.v for a sec while fan makes its 1 spin.

 

[dukefawks]

Vcore showing up too?

 

[Ryanlen2]

yes. Briefly.
Thanks Duke.

 

[dukefawks]

Then all power is probably ok. Was there any liquid in the Vcore area?