[solved]820-2850-a , unexpected shut down..... also when playing game

[turbo]

820-2850 board , some time it shut down it self or ... if you play game it will shut down.... is it any CAPS no good?

 

[dukefawks]

C9560 the usual.

 

[turbo]

c9560 is 1.5v thu

 

[JorgePayar]

c9560 is 1.5v thu

I think he means to change it for a normal cap 330 uf polyfilm
Did you change it already?
Does the GPU start boiling when you play games?Any artifacts?

 

[turbo]

when c9560, is bad it produce some resistance and we get 1.3 v and problem.. in my case, its 1.5v which is perfect

 

[JorgePayar]

I didn't know about the 1.3V. I have this value (1,3V) on c9560 I changed it but the same problem persist.
I have a similar problem with the same board, could you please measure and post values of :
r9589=
r9585=
r9571=

?
Thanks

 

[larossmann]

Do keep in mind that output on the rail C9560 is on changes based on load, it has the ability to output multiple voltages.

 

[turbo]

louis is it GPU? do they gpu issue in 820-2850?

if not gpu what do i check ? thanks

 

[turbo]

hi duke is it might be gpu issue, if not, then what do i chk except c9560, thanks

 

[dukefawks]

Did you change C9560??

 

[turbo]

not yet ... should i change it ?

 

[turbo]

wow change c9560, problem gone, but duke what exactly science behind this ! could you place explain, thanks

 

[turbo]

wow i had 2nd board, that is fixed too!!!! i use caps from a 2013 donner mac air board. high quality caps....newer too....

i think when gpu need high power (when play game etc) from that power rail ... caps cant hold too much power and gpu turned off whole system.... if we put more powerful caps this prob will never come back fro sure.... duke

what would be more powerful caps which can hold more current ?

 

[dukefawks]

Tantalum caps can go bad, no more science than that....