huawei y600-u20 need help

[paftech03]

good pm mga ka sir,

need help po ako sa tanggap ko na huawei..

history; dinala ng customer hang on logo xa,
try ko write firmware using sp flash tool
success naman xa at gumana kaso after 1 day bumalik ung
customer hang on logo ulit,
try ko program the same firmware na ginamit ko at sp flashtool, success again pero hang on logo na,
ilang beses ko na tinry lahat ng nagkalat po dito na firmware pero hanggang hang on logo na ung unit,,

http://postimg.org/image/di6lxgwf7/

any advice po mga sir, ty in advance po