Re: A1465 820-3435-B Fan spins on and off

I have a eeprom programmer arriving in the next couple of days, I'll give that ago.
In the mean time I will continue to search for any incorrect voltages/shorts.
Am I right in assuming the device needs PM_SLP_S5 present before it can go to S3/S0? (kind on the first step of booting).

Re: A1465 820-3435-B Fan spins on and off

So I removed the J6100, however the same symptoms occur. Test points around it are slightly discoloured however are physically sound and test ok.

@piernov Unfortunately it does it infinitely, and yes I get VCore pulsing between 0v-1.7v

Re: A1465 820-3435-B Fan spins on and off

Thanks for your reply,

I have checked the J6100 for corrosion however no signs. I will take it off regardless as soon as I can as I see on the schematic there is a lot of TP's under it?

Also after posting, I was checking everything around the U7100, no corrosion or dirty pads, however, When I measure voltage on PIN 8 (CHGR_VNEG) it pulses with the fan (0.2v-1.5v) but if I leave the probe on that PIN or the TP after that for more than 5 seconds, the device will stop trying to boot, no fan spin, no pulsing voltage....

Hi,

So I'm quite new to board level Macbook repairs, done a few backlight fixes however I'm tackling my first "Does not boot" issue, kind of feel like I've jumped in the deep end with this one.

This board has no real signs of liquid damage apart from a few brown test points.
All that happens is the fan will spin for about 1 second, and then stop and will continue to cycle like this indefinitely.

Here are all my current readings:

[B]PPBUS_G3H - 8.6v
PPBUS_S5_HS_COMPUTING_ISNS - 8.6v
PPBUS_S5_HS_OTHER_ISNS...

Re: Macbook Air (A1465) 820-3435-B Boardview

Thank you

Hey, I'm looking for a .BRD file for an 820-3435-B if anyone can point me in the right direction.

I have the schematic already.

Thanks

Re: New Members - please post your introductions here

Hi guys,

I've been doing phone repairs and computer repairs for a few years now, recently decided its time to take it to the next level and dive in to board level repairs.
All is going well so far, and have learnt a lot in the little time I've spent so far.

Hoping to learn a lot more here and help contribute!