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Yes , board is alway pulled out from top case while running the diagnoses. will check it in ohm

I unplugged it since the time that I posted the voltages and I woke up this morning after pretty much 10 hours I checked its diode mode reading again and R3205 still diode mode 0.00 and still getting 3.3V Should I remove that resistor and check its diode reading while being removed or...

R3205 UPC_XA_UART_TX = 3.3V but diode mode reading is 0.00 R3021 UPC_XA_RESET 0=0.00V and diode mode reading is 0.00 is that normal I do not have a Donor board here to compare.

I Have a donor board coming exactly the same model , I will reflash U2890 and see how it goes , otherwise I will have to suggest the client to get a new motherboard, but the data is important , will have to back up some important files via emails so that at least . I will keep you in the loop.

Here What I got from R5220/21 DIode mode reading of pp1v9_slps2r = 0.357 and Voltage is _ 1.8v R5220 I2C_UPC_SDA = 1.5V and diode mode = 0.433 R5221 I2C_UPC_SCL = 1.04V and diode mode = 0.431

Yes Will do that

i replaced U7000 With a new one , I am now getting PPBUS_G3H but still stuck at 5.13V on my amp meter , any other suggestion?

I checked all diode mode readings around U7000 , they all seems to be normal comparing to my prior diode mode readings The machine was powering on .

PPBUS_G3H in diode mode = 0.387

it could be , let me check PPBUS_G3H in diode mode.

I doubled and tripled check the area and also the back of where i was working but everything is in perfect shape, no knocked out components i use very good heat sink to protect all the surroundings to prevent any other components to get Knock out and precision heat , Here are the voltages of...

I changed Q7030/40 since then , all the voltages disappeared including PPBUS_G3H none of the 3.3V are present , no boot , I replaced Q7030/40 by the original ones that I removed and still no PPBUS_G3H neither The 3.3V please help me , I am worried now .

ok, for Q7030/40 I found an A1989 donor with marking T30 which match the A2289 that i am working on but the other markings are different, Do you think that they would work anyway?

TBT_X_TEST_EN at R2825 diode mode reading 0.058 is that normal as R2025 = 100ohms.

When I measure R7020 On the side of C7032 Not C7023 i got 0.2 ohms, as well as when i test it between R7015 And C7029 also giving 0.2 ohms. I went back to retake the voltages of . "1- P_IN = 5,08V But the #2 remains at the same voltage,I checked R7015 in ohms 225k ohms is that normal? 2-...

Oops , I Think there s a tiny confusion here according to my earlier message i posted those Yesterday at 10:36 PM Add bookmark #139 Here are the Voltages of the following lines , 1- P_IN = 10.41V 2- AUX_DET = 1.26V 3-VDDIO1P8 = 1.8V 4- SMC_RST_IN = 0.0V 5-VDDA= 5.14V 6-VDDP = 5.13V 7-AUX_OK...

The readings I have sent was without battery connected , as I pulled the board out of the top case. R7020 is intact i zoomed it under the scope with very clear view no physical damage, but I can replace it by a new one if you suggest me to , which side of R7020 I should measure to get the 10V ...

Here are the Voltages of the following lines , 1- P_IN = 10.41V 2- AUX_DET = 1.26V 3-VDDIO1P8 = 1.8V 4- SMC_RST_IN = 0.0V 5-VDDA= 5.14V 6-VDDP = 5.13V 7-AUX_OK = NC PAD 8- A/BMON=0.0V R7030/40 = 0.2 OHMS C7030/40 is solid and intact = 0.474 diode mode reading Q7030/40 looking fines in shape...

I did not get to reply to the first question, After I removed U2800 i Did not make any test , I went straight ahead and reball the harvested U2800 and replace it , I will proceed to conduct the following suggestions and will let you know .

Ok I will do that.