Oppo R831 after repair can't reflash

after can't reflash phone
Screen shot

so how to fix it? pls help me.

ChanRattanak error 4 check your CLK, D0, CMD way..
meybe broken

after factory reset did u re-partitioned emmc and write preloader

Deepakgarg
yes,ready bro

nand test????

ok,i try again and post result.