Macbook a1707 820-00281 Battery no Power

[leonemax81]

solved it was the thin cable, put 100W cable and it starts without battery, thanks for the help.

[mon2]

Is your 87W power supply with captive or removable USB Type C cable? If removable, is the type C cable certified for 100W use? Such a cable will contain an e-marker IC inside of the cable connector ends. We typically use only 100W marked cables with our type C power adapters for the beefier macbook repairs.

Summary from assorted sites including this thread:

a) adapter - test with another 100W rated adapter
b) battery - test with another known good battery

A1707 2017 15” Pro won't turn on without battery? : r/macbookrepair (reddit.com)

[leonemax81]

I have an 87w power supply, it doesn't turn on, the low battery symbol appears, can I bypass it?

[mon2]

with the original 87w power supply the low battery symbol appears and it does not turn on, can this be bypassed?

interesting. this thread is pointing back to the battery

A1707 820-00928 erratic 5V+bootloop on USB-C | Rossmanngroup Forums

[mon2]

Maybe losing track of the many permutations but thought this laptop boots fine if the battery flex is not connected. So leave the battery disconnected.

[leonemax81]

with the original 87w power supply the low battery symbol appears and it does not turn on, can this be bypassed?

[leonemax81]

honestly this macbook is boring me, is there a way to turn it on without the battery? the customer is fine even without the battery.

[leonemax81]

replaced U7000 for the third time with ISL9239C0, I read that it is compatible, nothing usual defect does not work with battery connected.😡

[leonemax81]

of course I support 100w, I never had problems, I already repaired many A1707 machines with this power supply, I also have the original 87w apple power supply for the macbook and the defect is the same.

[mon2]

What are the details of your bench power supply? Can it support 100W?

MacBook Pro 2017 board 820-00928 with missing PPBUS | Rossmanngroup Forums
* post # 10

[leonemax81]

I have repaired many machines with this power supply, never had any problems of any kind, it is not a power supply.

[leonemax81]

I use a bench power supply, and the macbook starts with my bench power supply.

[mon2]

What are the details of your power adapter?

macbook a1707 820-00928 - Badcaps
* post # 22

I think you will be ok if using a 100W PD adapter with a certified 100W cable.

[leonemax81]

with only the black cable connected 3,700 kohm

[mon2]

Yes. We wish to be sure that this line is parked with the pull-down resistor of 10k and not floating. You will still measure the 0v if the line is floating. We need to be sure this line is parked to a logic low.

[leonemax81]

should I check the SYS_DETECT_L signal with battery flex connected if it goes to low signal?

[mon2]

Confirm the resistance to ground of pin # 1 of the battery flex while it is connected to the logic board. Do not believe it is the CD3215.

[leonemax81]

could it be a bad CD3215 chip? when the battery is connected it doesn't work well?.

[leonemax81]

hi friend do you have another suggestion, this board is making me lose my mind, thanks so much for the help.

[leonemax81]

replaced Q7065 twice without success.