820-3462 liquid damaged

[arnonabuurs]

Hi guys I have an 820-3462 with some small liquid damage around these components:

Near Q2620
R2851
L6754
U5360
Q7220

De mac sometimes turned on but most of the time not. After replacing corroded R and clean up corrosion life was looking great. Ultrasoniced the board to get rid of the flux, and now I dont get a light on the charger, bummer. Area around U7000 and DC IN board all looks super clean. I get a fluctuating 16.2 - 16.76 on F6905 and nothing on DC IN at U7000 (pin 2) 15 - 15.52 on pin 1. Parts in the charge circuit all look pretty neat. No short on F6905. PPBUS, PP3V42 atc obviously all 0 as it seems power isnt making its way to U7000. Where to start? Havent fixed many of these yet.

 

[arnonabuurs]

I have this missing -> =PPDCIN_S5_CHGR_ISOL R7005 is OK, no short on pin 2, checking the rest now

 

[arnonabuurs]

Looks like D6910 is gone, also missing on my donor board, its like a black little cube right? Ill try what lewis recommended in another post: ->

You can use D7012 from an 820-3437 or 820-00165 in a pinch but you should have donor boards and no do not use a wire!

 

[arnonabuurs]

Thanks bro you saved me my Saturday night! After replacing the missing D6910 from a 3437 working again as a new one. If you ever come to Bangkok I owe you a beer, or 2 !

 

[2informaticos]

Glad to hear you solved it.
Bangkok is so far of Madrid...

 

[arnonabuurs]

Good for holiday though