820-2769-A Green Light, No Chime, No Video, No Nothing
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820-2769-A Green Light, No Chime, No Video, No Nothing
justin.millman
Hey, I have this air board here. 2769-A That gets a green light now and comes on, the fan is spinning to fast and so far I've been testing the power rails.
ppvcore_s0_cpu is .925V (1.25V)
pppcpuvtt_s0_reg is 1.05V (1.05V)
ppmcpcore_s0_reg is .931V (1.05V)
ppvtt_s0_ddr_ld0 is .669V (.75V)
ppvtt_s3_ddr_buf .674V (.75V)
pp1v05_s0_mcp is 1.05V (1.05V)
ppbus_g3h_r_out is 8.33V (8.4V)
I remembered from a youtube video I watched to check the v-core when there isn't a chime and low and behold it is coming up low all over the place.
A lot of other rails seem to be coming up a bit low and I'm not sure if there is a tolerance on these and how far it would extend.
I'm a little stuck here, any advice?
Hey, I have this air board here. 2769-A That gets a green light now and comes on, the fan is spinning to fast and so far I've been testing the power rails.
ppvcore_s0_cpu is .925V (1.25V)
pppcpuvtt_s0_reg is 1.05V (1.05V)
ppmcpcore_s0_reg is .931V (1.05V)
ppvtt_s0_ddr_ld0 is .669V (.75V)
ppvtt_s3_ddr_buf .674V (.75V)
pp1v05_s0_mcp is 1.05V (1.05V)
ppbus_g3h_r_out is 8.33V (8.4V)
I remembered from a youtube video I watched to check the v-core when there isn't a chime and low and behold it is coming up low all over the place.
A lot of other rails seem to be coming up a bit low and I'm not sure if there is a tolerance on these and how far it would extend.
I'm a little stuck here, any advice?
Re: 820-2769-A Green Light, No Chime, No Video, No Nothing
Chipmaster
I'm not as good with Apple as my peers.
by fans spinning fast,and no vcore. Usually a Bios.
I will let the others stomp on me over this, as I am not as much Apple as they are.
I'm not as good with Apple as my peers.
by fans spinning fast,and no vcore. Usually a Bios.
I will let the others stomp on me over this, as I am not as much Apple as they are.
Re: 820-2769-A Green Light, No Chime, No Video, No Nothing
justin.millman
yeah apple doesn't have the regular bootable bios like a pc laptop does.
yeah apple doesn't have the regular bootable bios like a pc laptop does.
Re: 820-2769-A Green Light, No Chime, No Video, No Nothing
Louis Rossmann
First thing's first, the back story. What's the story? Dropped? Spill damage? What do your eyes see?
First thing's first, the back story. What's the story? Dropped? Spill damage? What do your eyes see?
Re: 820-2769-A Green Light, No Chime, No Video, No Nothing
justin.millman
Client refuses to admit anything, says it just stopped working. I can't say I 100% believe here. but there are no dents or dings, and the board is clean.
Client refuses to admit anything, says it just stopped working. I can't say I 100% believe here. but there are no dents or dings, and the board is clean.
Re: 820-2769-A Green Light, No Chime, No Video, No Nothing
justin.millman
Looking around randomly with the microscope I see a lot of burned test points, but I'm not sure if thats normal since I just got the thing yesterday.
Looking around randomly with the microscope I see a lot of burned test points, but I'm not sure if thats normal since I just got the thing yesterday.
Re: 820-2769-A Green Light, No Chime, No Video, No Nothing
Louis Rossmann
When I say story, I mean your story. Fuck the client. They always lie, more often to themselves than to you. They believe that if they believe they did nothing to it, that nothing will be wrong. It is a form of wishful thinking that plagues consumer electronics repair, like all the people coming in asking if it is just the cable, etc.
Take a picture of the burned test points. Also, does it smell like a spill?
When I say story, I mean your story. Fuck the client. They always lie, more often to themselves than to you. They believe that if they believe they did nothing to it, that nothing will be wrong. It is a form of wishful thinking that plagues consumer electronics repair, like all the people coming in asking if it is just the cable, etc.
Take a picture of the burned test points. Also, does it smell like a spill?
Re: 820-2769-A Green Light, No Chime, No Video, No Nothing
justin.millman
I had a small emergency and had to leave the office a little early. I will take pictures for you tomorrow. there are a few suspect areas I know of already, I think. I just got this microscope so maybe its supposed to be like that.... Other than that the caseing is in good shape doesn't appear dropped at all, and no liquid smells either.
Anyways... Thanks so far I'll get back at it tomorrow.
I had a small emergency and had to leave the office a little early. I will take pictures for you tomorrow. there are a few suspect areas I know of already, I think. I just got this microscope so maybe its supposed to be like that.... Other than that the caseing is in good shape doesn't appear dropped at all, and no liquid smells either.
Anyways... Thanks so far I'll get back at it tomorrow.
Re: 820-2769-A Green Light, No Chime, No Video, No Nothing
SteveTech
Looks regular to me...so stop worry about that concentrate to other )
Looks regular to me...so stop worry about that concentrate to other )
Re: 820-2769-A Green Light, No Chime, No Video, No Nothing
Louis Rossmann
I agree. Brown is normal, red is what you worry about.
I agree. Brown is normal, red is what you worry about.
Re: 820-2769-A Green Light, No Chime, No Video, No Nothing
justin.millman
So where do you think I should look next with the lower than it should be vcore.
So where do you think I should look next with the lower than it should be vcore.
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