820-2850 A Not power on

tipoti

Member
hi,
there was a picture on the device, but there was a square on the screen,so i removed the video card, reballing it and plugged it in. but the fan keeps turning and stopping , it keeps doing the same thing it turns. orj 85 watt apt. no battery

SCL = 3.421 Voltage fixed
SDA = 3.421 Voltage fixed

Diyot mode
SCL=0.505
SDA=0.504

F7040 = 12.57 Voltage fixed

i tried SMC bypass = the fan spins 1 time at full speed and stops then spins again at normal speed and stops
 

2informaticos

Administrator
Staff member
Something wrong happened reworking GPU.
Maybe knocked off components, or heat affected other components.

Why didn't disable GPU???
 

tipoti

Member
The customer asked for the graphics card to be repaired.

I disconnected the video card from the motherboard but the device does not turn on

where do we check?
 

tipoti

Member
Is it normal that the device does not turn on when the video card chip is not on it?

no fan spin

c9560 pin 1 = 1,3 voltage voltage comes and goes
L7415 pin 1 = 1,0 voltage voltage comes and goes
 
Last edited:
Top