not booting orange flashing light

OKAY i have replaced the battery i have replaced I/O board i have replaced keyBoard i have replaced hard drive and mag dc connector

started up installed os on new hard drive left it to transfer data over to new os left it to do its thing. then when i came back it wont boot up no light s just blinking orange on charger

my last logic board had blown after refiting i got it to start once then charger blinking started no boot then replaced the keyboard worked straight away no probs had it on for hours then nothing back to the same thing

have tried smc reset i have tried unplggging connectors i leave it for up to two days off to try again so all charge is gone but still nothing i have pretty much

any ideas????