A1297 macbook 2011 Won't charge

[retrorepair2]

Got a 17" macbook pro which I suspect has been damaged by a charger with an iffy magsafe connector (3rd party).

The battery reports correctly in macos and windows, shows manufacture details etc, condition normal, health status good but always says not charging.

Magsafe led is always green, never orange.

Without battery connected I get a voltage at the battery power pins, with it I only see the battery's voltage. I assume this means the SMC is preventing charging?

Not sure where to start. The bad power adapter was disposed of, the wire near the magsafe would audibly short and I'm certain this things got no protection built into it.

Testing using a known good official charger.

[retrorepair2]

Re: A1297 macbook 2011 Won't charge

I should add the machine does run off the power supply and did also run off the battery until it depleted (now on about 7%).

Did all the usual pram and smc reset stuff

[mon2]

Re: A1297 macbook 2011 Won't charge

Remove all power. Meter in resistance mode. Check the resistance of the current sense loop for the battery charger leg. Measure at the charger IC pins. Confirm the path resistance agrees with the schematic values.

[rookieme]

Re: A1297 macbook 2011 Won't charge

as mon2 said check R7051 and R7052, usually the second one is failing, also SMBUS_SMC_BSA_SCL & SMBUS_SMC_BSA_SDA lines should be at 3,3V with battery connected

[retrorepair2]

Re: A1297 macbook 2011 Won't charge

They all seem fine and without the battery connected I'm seeing the correct charging voltage.

I've checked coconut battery and though the battery hasn't locked itself, the capacity is less than 4% so I'm just thinking it's a crap battery. Oh well.

[mon2]

Re: A1297 macbook 2011 Won't charge

Yes, could be crap battery. As noted by @Piernov in numerous articles, 99% of the time, it is the battery to blame.

Order one to test with Amazon from a reputable vendor and return it if it is not required.

Since you can extract the vitals - fake or real, the SMbus lines are working.

Test each linked to battery mosfets to be sure they are not leaking.

[Pasglop]

Good morning
I have an Apple A1297 with components that burned, 5V USB in this case, I am looking for the diagram and the boardview to repair it. thank you

[mon2]

Pasglop - it is best for you to start a fresh thread with your details. We also require the 820-**** details from your logic board that identify the PCB model inside of your unit. Respectively, locate the USB connector and nearby this connector will be the USB load switch which act like solid state relays. Often they get killed. Very common parts to source and replace if you have lost the VBUS rail = +5 volts. You should also be able to confirm the damaged part through a visual inspection of the USB load switch.

You may also have a burnt EMI filter that is in series with the USB load switch to the USB connector for the VBUS power rail. This filter can burn out if there is an excessive current draw or similar event on the USB port.

Here are the many versions of this logic board so need the specifics of your board:

[Pasglop]

Thk very much !