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Hello. Im working on a 820-00164 board it will not power on.
I have green light in magsafe.
When measuring PP5V_S4RS3 it is unstabel and gose from 0V - 3V - 0V - 3V
Same with PVCC_S0_CPU its go from 0 too around 1,5V then drop again
working on a old 820-2533 with no pictures, no backlight and no chime.
I don't know history off board but found some a little area with water damage (around u6990 replace u6990 and the capacitor straight with and cleaned area)
Still no pictures no chime no backlight.
When I remove the ram it...
Hello. I'm sitting with a 820-3536 board with keyboard issue. 9 O L . and @ dosent respond.
I have replace new keyboard connector and tried know good working keyboard with same result.
Question dos anybody know witch pin on j4813 or U4801 that create signal for those.
I have a liquid damaged 820-3462 board here, it's liquid damage around smc I have cleaned up all nasty resistor and capacitors.
The board is not always powering it's like depending on witch day it is..
Could it be bad smc?
Have a 820-00875 board with out pictures on screen. any idea where to start? i have backlight. smc reset dosent fixit.
no sign for water damage. i dont know any history except that the customer mean that screen working on extern screen.
have a 820-3437 Logic board with short on ppvrtc_g3h. I removed u1900 still short. Try to inject voltage (3V) but it only draw0.190A so around 0.58W. Any tips to next step?
Ppvrtc only give 1,3ohm.
it is liquid damage. Good cleaned before I got it..
working on a 820-3536 card liquid damage.
liquid damages around pch area, u1900 area and i have replace keyboard connecter for missing pin 5 on it.
i have light on usb mous.
No pictures on external screen (using mini display port)
Have trayd PRAM reset with no luck
Have cleaned card in the UC...
working on a 820-2936.
when board is only connected lcd the backlight flash instead off wiving flashin folder. (http://tinypic.com/r/55qy3q/9)
when i connect all cable i get no pictures and dark screen (only light in apple logo)
Have trayd know good lcd and new ram.
i have pictures...
Have this 820-3332 logic board. What is happening here?
have tray`d to replace LVDS connector and resloder the u8900 but still the same.
(pictures is taken up/down)
Any one with any idea?
dukefawks larossmann 2informaticos
Sitting with a 820-3115 logic board with liquid damage around u3890 area and j6995.
it have short on PP3V42_G3H (i lift the L6995 and injectt 3,2V) but can't find something that been heatet up (i only get 0.23A on the PSU)
have also replace the u7000
sitting here whit another 820-3115
on P5VS3_LL i measure 0.010 in diode mode that is ground? (i think it should been around 0.138) have tray to remove u7200 C7290 C7291 C7293 and q7260 and still have the same can anybody pleas tell me next step?
Have a 820-3115 that wont power up.
Have green/orange light in magsafe
PP5V_S5 : 5V
Missing s4 trace
(History the owner just told me that it died under OS install) no sign off water damage.