Macbook Air a1466 820-00165-a (No power , have orange light)

[GB1999]

Hi there i have a Macbook Air A1466 board number 820-00165-A. No power, and has Orange light when plug in to charger. SMC is working and the Fuse is good. Found a Short and removed. But still there is short on mosfet. The short leading to Capacitors near Processor.

- 2 Mosfet Near The Processor Is Shorted. (Already Tried Injecting 1V, draining 0.07A) Unable to shop the shorted area. Marked Blue.

- Already Checked Big Capacitor below the processor. (Good Capacitor) Marked Blue.
- Found a short and solved the issue. ( Red marked Big Cap)

Anyone have solution or method to check please let me know. Thanks.

[mon2]

Re: Macbook Air a1466 820-00165-a (No power , have orange light)

Low voltage rails will be with a low resistance.

Is the power adapter the original?

Do you see a green magsafe light when the adapter is connected?

What is the voltage to ground of ppbus_g3h ?

Confirm the voltage to ground of the 3v42 rail.

[GB1999]

Re: Macbook Air a1466 820-00165-a (No power , have orange light)

adapter is in orange light, ppbus_g3h present and 3v42 rail is present

[mon2]

Re: Macbook Air a1466 820-00165-a (No power , have orange light)

What is the exact voltage of ppbus_g3h to ground?

[reformatt]

Re: Macbook Air a1466 820-00165-a (No power , have orange light)

Follow the power sequence as what you have provided is not really helpful from an advice point of view.

https://logi.wiki/index.php/G3_to_S3..._and_Broadwell

Vcore on MBA is usually around 10 ohms or so. PCH should be around 150 ohms or so at ambient temperature.

[piernov]

Re: Macbook Air a1466 820-00165-a (No power , have orange light)

https://www.badcaps.net/forum/showpo...02&postcount=2

[jacknick]

Re: Macbook Air a1466 820-00165-a (No power , have orange light)

Great, many thanks.

[salawayon]

Re: Macbook Air a1466 820-00165-a (No power , have orange light)

Follow the power sequence as what you have provided is not really helpful from an advice point of view.

https://logi.wiki/index.php/G3_to_S3..._and_Broadwell

Vcore on MBA is usually around 10 ohms or so. PCH should be around 150 ohms or so at ambient temperature.

thanks. current status of the unit just GREEN LIGHT then ORANGE LIGHT. with missing "PM_SLP_S5_L = 3.3V" VOLTAGE. board had corrosion on U8180. i already replaced U8180 and lines were okay around U8180.

[salawayon]

Re: Macbook Air a1466 820-00165-a (No power , have orange light)

@u7501 (tps51980a)

1 p5v_s4rs3_drvh ======== 0
2 pp5v_s4rs3 ======== 0
3 p3v3_s5_rf ======== 1.255v
4 p5vs4rs3_en_r ======== 0
5 p5vs4rs3_pgood ======== 0
6 p5vp3v3_skipsel ======= 2v
7 p5v_s4rs3_csp1 ======= 0
8 p5v_s4rs3_csn1 ======= 0
9 p5v_s4rs3_vfb1 ======= 0
10 p5v_s4rs3_comp1 ======= 2v
11 p5v_s4rs3_func ======= 0
12 smc_pm_g2_en ======= 3.45v
13 p5vp3v3_vref2 ======== 2v
14 pp5v_s5 ============= 5v
15 p3v3_s5_comp2 ========== 2.236v
16 p3v3_s5_vfb2 ========== 0
17 p3v3_s5_csn2 ========== 0
18 p3v3_s5_csp2 ========== 0
19 p5vp3v3_skipsel ======== 2v
20 s5_pwrgd ============= 0
21 p3v3s5_en_r ============ 3.45v
22 p5vp3v3_vreg3 ========== 3.32v
23 ppbus_s5_hs_other_isns = 8.65v
24 p3v3_s5_drvh =========== 0
25 p3v3_s5_ll ============ 0
26 p3v3_s5_vbst =========== 5.04v
27 p3v3_s5_drvl =========== 5.04v
28 gnd
29 pp5v_s5 ================ 5.04v
30 p5v_s4rs3_drvl ========= 0v
31 p5v_s4rs3_vbst ========= 4.83v
32 p5v_s4rs3_ll ========= 0