WSOD Frequent K550i

Hi,

I have WSOD problem very frequently in my phone, I am sure i have used correct Firmware for everything, First time it worked for couple of days again WSOD, then i reflashed worked for couple of hours again same, Now it has become more wores even i reflash it will work for a minute or you can't say when it will show white screen, I have also tried converting this with W610 then also it worked fine for couple of days again same problem, I am using XS++ each time,

Here are logs

09:03:29| Profiling SEMC phone...
09:03:29| Platform: DB2020
09:03:29| OTP CID: 51
09:03:29| EROM CID: 52
09:03:29| EROM Color: Red
09:03:29| IMEI: 35489301xxxxxx
09:03:29| Phone ID: K550
09:03:29| Region: RUSSIA
09:03:29| CDA: CDA102568/1 R2A
09:03:29| Firmware Version: R8BA024
09:03:29| EROM: R3A016
09:03:29| Ready for operation!

Firmwares used.
Main - k550_r8ba024_main_generic_li_red52.mbn
FS - k550_r8ba024_fs_c_asia_red52.fbn (Also used Russia but didn't work)
Files - In built with XS++ K800 CDA102568/1

Each time i reflash it works for temporary fix for couple of minutes only, sometimes it keeps blinking white and black.

Any help is highly appreciated.