820 2936 after 2 - 5 min image flash and goes down!

[2informaticos]

Does it stay on if you lerave it in boot menu?
Can you run ASD EFI?
You could try new BIOS, with clean ME...

 

[Noguinfor]

yes stay on!! when i put ASD the Image flash's can't see what the problem is!! some times works well 5 - 10 min some times 10 sec after i turn on!!

Already test with a clean_me bios and same history!!!

 

[2informaticos]

Can you enter to OSX in SMC bypass mode?
Don't forget the simply things, like SMC/PRAM reset...

 

[Noguinfor]

forgot smc reset.. only tried PRAM reset. ok after applied a SMC reset the machines never more Flash the LCD!! i'm listening music on youtube +15 min and looks fine.. But when i shut down the machine and turn on again after 1-2 min i get same problem!! i will try to run ASD! Thanks