Ga door naar hoofdinhoud

Released September 16, 2016. Models A1661, A1784, and A1785. Available in 32, 128, or 256 GB configurations in Rose gold, gold, silver, black, jet black, and (Product)Red.

762 Vragen Bekijk alle

Stuck on apple logo, now fully shorted

Block Image

<- do you think this micro crack can be the issue ?

Hi,

I´ve got iphone 7 plus which was stuck on apple logo, power consumption was 0.80a and occasionaly jumped to 1.5a for a split second.

I left it like that for 2 minutes to see if it will eventualy boot up.

Unfortunately phone died and went to the full short after that and PMIC is extremely hot .

Should this cause PMIC to fail or most probably that is some cap shorted anywhere else without the heat coming out of it ?

I want to make sure before I pull anything from the board.

thanks

Beantwoord deze vraag Dit probleem heb ik ook

Is dit een goede vraag?

Score 0

Commentaar:

We will need more info. You say it went to full short. Did you determine this from your ammeter? First diode mode VDD_Main or hook up a dc power supply and see if it is drawing current before prompt to boot. If it is a VDD_Main short I doubt it would be the PMIC it could be a capacitor or IC. Just because something gets hot doesn’t mean it has a short to ground.

door

Een opmerking toevoegen

MacBook-reparatiesets voor batterijen

Vanaf $69.99

Buy Now

MacBook-reparatiesets voor batterijen

Vanaf $69.99

Buy Now

2 Antwoorden

Het nuttigste antwoord

As Chris commented above, more details are always welcome when it comes to remote diagnostics. However, I will say that the PMIC is rarely the failure point on the iPhone 6S & 7 series. If the PMIC becomes excessively hot, it is usually caused by a downstream short. SO start probing the PMIc outputs to determine if there is a short and work your way from there.

Was dit antwoord nuttig?

Score 3

Commentaar:

Which crack are you referring to? Personally, I don't see one ;>). Do you mean the line at the top-right corner of the PMIC? That's just underfill residue.

door

Well, I removed every component on PP2V8_UT_AF_VAR and it's still in short . So my guess is pmic

door

Een opmerking toevoegen

So you removed the 4 components in the pic and it is still shorted? Even if this line was going to ground I would think the phone would still boot. Can you confirm these are the components you removed?

Block Image

Was dit antwoord nuttig?

Score 0

Commentaar:

Only the caps, the ones on the other side near the connector as well.

door

Een opmerking toevoegen

Voeg je antwoord toe

Michal zal eeuwig dankbaar zijn.
Weergavestatistieken:

Afgelopen 24 Uren: 0

Afgelopen 7 Dagen: 0

Afgelopen 30 Dagen: 3

Altijd: 57