A1466 M/B 820-00165-A no power

[skynet85]

No power , no have PP5V_S4RS3
When the charger is connected, the green LED is off ,even when the battery is connected, on flash U6400 have 1pin 3.3v 8 pin 3.3v
On L7095 ( PP3V42_G3H ) I have 3.43v
On L7130 ( PPVBAT_G3H_CHGR_REG ) 8.2v without battery
On L7560 ( P3V3_S5_REG_L ) 3.3v

Оn the rest of the current chokes nave 0v. Tell me what to look for ?

[ACS-Repair]

Re: A1466 M/B 820-00165-A no power

You have PP3V42_G3H so you should have a green light on the charger. Are all the cables connected to the DCIN board? Without the flat ribbon you won't see a green light.
You appear to be missing S0 power rails. That could be almost anything at this point. Check to see which are missing and find what is in common. Get the green light working first.

[reformatt]

Re: A1466 M/B 820-00165-A no power

Check SMC_RESET_L. This should be high sometime after power on. If it stays low, SMC won't come out of reset and you won't get one wire comms (or much else for that matter). Usual suspects are corrosion around U5110 or the JTAG connector J6100 as this signal is also on that connector.

Check board closely under microscope for corrosion.

[skynet85]

Re: A1466 M/B 820-00165-A no power

Are all the cables connected to the DCIN board? Without the flat ribbon you won't see a green light.
You appear to be missing S0 power rails. That could be almost anything at this point. Check to see which are missing and find what is in common. Get the green light working first.

I understand thank you, firstly I check now or replace flat ribbon 821-1722-A

Check SMC_RESET_L. Motherboard no have corrosion around at U5110 and at connector J6100 everything is clear.

Check board closely under microscope for corrosion.

On SMC_RESET_L have U5110 pin5 0v

Secondly I am think now to raise SMC , SMC_RESET_L this signal generates ?

[skynet85]

Re: A1466 M/B 820-00165-A no power

I understand thank you, firstly I check now or replace flat ribbon 821-1722-A



On SMC_RESET_L have U5110 pin5 0v

Secondly I am think now to raise SMC , SMC_RESET_L this signal generates ?

SMC raised, rolled the legs, then plant, now on U5110 pin5 SMC_RESET_L have 3.4

As I know, this series is turned on by autostart after connecting charger
All the same to the rest current chokes have 0v, with the exception of L7560 3.3v and the indicator is on green

[mon2]

Re: A1466 M/B 820-00165-A no power

1) voltage on U5110, pin #1 ?

2) voltage on U5110, pin # 6 (SMC_LSOC_RST_L)? # 7 ?

3) R5100 present on the logic board ? Is it being pulled up to PP3V42_G3H ?

4) Use alcohol and with Q-tip, clean up the solder connections on J4800. You may have corrosion on this area. Trackpads / keyboards are a major area of faults. You can remove the cable to J4800. It is not needed to test this logic board with fan spin and power on.

5) From your last fix, the magsafe GREEN power light is now ON ? Does it go green since you do not have a battery connected ?

6) voltage on

PPCHGR_DCIN_D_R ?

PPBUS_G3H ?

PPDCIN_G3H ? This is the DCIN adapter voltage.

[skynet85]

Re: A1466 M/B 820-00165-A no power

1) on U5110, pin #1 3.43v
2) on U5110, pin # 6 3.43v (SMC_LSOC_RST_L)? on # 7 on 3.43v
3) R5100 yes present on the logic board , on pin1 have 3.43v
4) I am use alcohol and the board is not wet, but I nevertheless cleaned almost everything, yes I pulled out the board and left only the cooler and the power jack.
5) Yes magsafe GREEN power light is now ON, strange but , it lights up green for a second and then lights up orange, it feels like the battery is connected.

6) PPCHGR_DCIN_D_R have 14.8v
7) PPBUS_G3H have 8.2v
8) PPDCIN_G3H have 15.14v

Тhanks for your help

[mon2]

Re: A1466 M/B 820-00165-A no power

These are good voltages.

Add the fan and see if you have fan spin.

Orange light is correct if the battery is missing. For now, the battery is not required.

Attach a display. What is the backlight voltage for the LCD?

Can you see any graphics with a flashlight on the back of the lcd panel (apply light where the apple logo is) ?

Remove the SSD. It is not required. After a delay, the flashing '?' will appear since SSD is removed.

[skynet85]

Re: A1466 M/B 820-00165-A no power

These are good voltages. understandable

Add the fan and see if you have fan spin. he is not spinning

Orange light is correct if the battery is missing. For now, the battery is not required. with the battery on or off lights up orange

Attach a display. What is the backlight voltage for the LCD? there is nothing

Can you see any graphics with a flashlight on the back of the lcd panel (apply light where the apple logo is) ? checked with a flashlight, nothing

Remove the SSD. It is not required. After a delay, the flashing '?' will appear since SSD is removed. does not blink




After connecting the battery and charger, I get such voltages : L7320
PPVCC_S0_CPU_PH2 1.8v, L7310 PPVCC_S0_CPU_PH1 1.8v, L7630 PP1V05_S0_REG_R 1v, L7430 PPDDR_S3_REG_R 1.2v, L7560 PP3V3_S5_REG_R 3.3v, L7520 P5V_S4RS3_REG_L 5v, L7130 PPVBAT_G3H_CHGR_REG 8.6v, L3095 PPVBAT_G3H_CHGR_REG 0v, L7701 2 LCDBKLT_BOOST 0v

[reformatt]

Re: A1466 M/B 820-00165-A no power

Confirm your PPBUS_G3H? If it's 8.2V then SMC is not communicating to the ISL chip.

[mon2]

Re: A1466 M/B 820-00165-A no power

PPVBAT_G3H_CHGR_REG 0v

Can you recheck this value ? This is the voltage from PPBUS_G3H which is working on your board.

L3095 is @ 0V ?

Check & post the voltage for the ENABLE pin 25 (TBTBST_EN_UVLO) of this IC.

[skynet85]

Re: A1466 M/B 820-00165-A no power

Confirm your PPBUS_G3H? If it's 8.2V then SMC is not communicating to the ISL chip.

Yes on PPBUS_G3H I have a 8.6v. You mean problem in PBus Charger IC ISL6259 ?

Can you recheck this value ? This is the voltage from PPBUS_G3H which is working on your board.
I checked on F7140 , and have 8.6v

L3095 is @ 0V ?

Check & post the voltage for the ENABLE pin 25 (TBTBST_EN_UVLO) of this IC.

On pin 25 have 0v

[mon2]

Re: A1466 M/B 820-00165-A no power

See attached. Post the voltage readings.

[skynet85]

Re: A1466 M/B 820-00165-A no power

See attached. Post the voltage readings.

1) 0v
2) 0v
3) 8.2v
4) 8.6v

Thanks to everyone who helps to lift the motherboard

[mon2]

Re: A1466 M/B 820-00165-A no power

Voltage on Pin #1 - Q3005 ?

[reformatt]

Re: A1466 M/B 820-00165-A no power

BTW, are you using a genuine magsafe 2 charger? 820-00165 boards are very fussy and you will often get erroneous and/or varying measurements when using knock offs.

Review your PM_SLP_S4 pre-requisites. This page from a mate of mine Ben has some good pointers on it. Don't bother troubleshooting any of this without a genuine Magsafe 2 charger.

https://ifixelectronics.com.au/missing-pm_slp_s4_l/