For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.
don't know whats happen here but i took bigger fuse is normaly original on board and now is working :) i have 33.45v on backlight output now :) thx for help
ok. i removed and clean dcin connector and bridged pin 5 dcin to u6900 pin 5 and now i have green light on charger but when i connect 16.5v charger. when i connect 18.5v no green light :( very strange situation
hi guys. i have board 820-2850 with no backlight. voltage checked:
BKLT_EN : pin 4 3.12v (is that a problem?)
PP5V_S0: pin 23 4.95v
d9701: pin 1 12.61v pin 2 24v
not sure what i need to check more. still learning anybody can help. its emergency job !!! :)
i have board with was water damaged. replaced few components with was look bad but still no sign of life.:
PPBUS_G3H : 12.6v
PPDCIN_G3H :16.37v
PP3V42_G3H :3.41v
SMC_BC_ACOK_VCC: 3.42v
ADAPTER_SENSE: 3.42v
any idea why light is so dim and no power up ?
ok. i done jumper from pin 5 on magsafe connector to u6900 pin 5 and now motherboard is working :) thx for all guys . all of you give me little bit to think how is it work and now is powering up. Done!!!
also there is new sympton. there is no green light on charger after when board was turning self of but if i power it up fan will spin for 5 seconds and stop spinning.
[SOLVED]820-3115-b powering up with green light on charger then turning of after 5 second
820-3115-b powering up with green light on charger then turning of after 5 second and green light going of. any idea?then when i disconnect and connect again green light coming on and powering up and do...
ok voltage:
3v42= 3.44
ppbus_g3h = 12.62v
SMC_BC_ACOK= 3.3v
i left board diconnected for we while and connect it again and powered up. and i reconected and connect again and is dead now. must be some capacitor faulty
i dont know :(