820-00392-a ic problem

[paky]

hi i have a problem with this board. ic sic 635 burned out and ruined my board Anyone know how I can fix it? thank you

 

[2informaticos]

I don't see any fix in this case.
I'm not sure what MLB do you have on the desk; surely not 00392 (is that battery code?).

However, a SICxxx chip should be for a CPU power rail.
I bet is dead now...

 

[paky]

Battery is A1713

 

[2informaticos]

820-00392-a - Buscar con Google

Does it look like MLB code, or battery???

Please, put some effort from your side and learn how to find the correct MLB code!

 

[paky]

yes same battery

 

[2informaticos]

I asked you about MLB (Main Logic Board) code; you've posted battery code.
I can suppose you have 820-00239 MLB; why don't you confirm???
Really didn't get an idea from the Google link?

 

[paky]

sorry my code 820-00392-a

 

[2informaticos]

Is that code printed on the Main Logic Board???

Is possible to upload a picture of your entire MLB?
Do you have an A1708 machine, which year?

 

[paky]

i have only this code

 

[paky]

2017

 

[2informaticos]

I said MLB (Main Logic Board); is the BIGGEST board you can find in your laptop.
Something like here maybe?

820-00875 - Buscar con Google

 

[paky]

this is the board but I don't find codes

 

[2informaticos]

Check near the SSD slot...

 

[paky]

Great 820-00840-a

 

[2informaticos]

I suppose you are talking about one of U7410/20/30.
There is the iGPU power supply.
Any of these chips burnt in such bad shape, can only means dead CPU.
This board is trash now, good for spare parts...

 

[paky]

how can i do some tests?

 

[2informaticos]

If you lift corresponding coils, will find short to ground on CPU side for sure.

 

[paky]

I ask a stupid question: if the cpu has low resistance the multimeter doesn't always give me short?

 

[2informaticos]

What if you post exact ohm resistance?
Short and low resistance is not the same.
You can compare with similar good board.

 

[paky]

i have only this board for this model