Apple APPLE A1286 820-2915-B

gpu is same model as the damage ?
(el gpu que cambiaste tiene la misma matricula que el dañado ? )

 

Yes is the same !!!!

 

in some cases when i replace gpu new i prefer change solder balls to PB , other use lead free
maybe with a reflow set more tempetature just litle more
or maybe one pad have oxided and ball not make contact there

 

Do not think is faulty pad, i use PB too !!!

 

last week i have same problem maybe the chip bad (GPU)
my customer take off machine so cant work anymore with this,
if you have solve this issue let me know plz this problem is very comun in laptop mac late 2013

 

I have here 2 machines with the same problem

 

CPU and VGA replace and same thing !

 

so you think is mobo ?

 

yes i indeed think its a issue around componetery or even inner layer issues , when a motherboard of this model is not protected with kapton and alluminum tape the motherboard never stay ok again , NOW if i protect well the motherboard and leave only the gpu area open even after replace the motherboard stay working very nice . NOW if i dont protect motherboard it start havicng issues with grafics . (attention that even on does motherboard we've replaced the Vrams and the issue persisted , we've seen clocks , and vcores and even Csense , and all normal , even on does case we have been changing components with new ones , but same issue ... does board for what we can see here , they cannot stand much heat , getting all fucked around unless you protect weel the motherboard before making gpu exchange !

 

a1286 vga share at good price 100% working

 

vga share is only solution

 

you mean ? plz explain more

 

serch on net harry7705

 

change chip for solution

 

i search but no reply you have for sell solution ?

 

I have this same motherboard pn 820-2915-b
entry for video failure, make a reballing to the video chip and work correctly for 2 days, then I stop turning on the computer (leave the battery 1 hour disconnected and turned on) but now I do not work keyboard or mouse pad. (I've tried another keyboard, another mouse, another operating system)

What can be?

 

how to fix this error
send me solutions

 

is not going to diagnostics