Lenovo S898T+ flashing rom problem

I have a problem, after flash the phone is working (play boot sound, buttons illuminate when it touches), but the screen is all time black.

My phone is Lenovo S898t+ , originally rom was in developer version with many bug`s:
- no possibility to change time zone
- most applications close itself after starting
- almost 60 % in chinese language 40% in english

I downloaded ROM Lenovo S898T Plus 4.2.2 from xdafirmware (I could`t find stock rom 4.4.2 working with SP Flash Tool - incorrect scatter file format)

When I used SP_Flash_Tool_v5.1516 whit this rom phone turns on for 3 seconds with a black screen and then turns off - This situation is repeated over and over again. (Stuck in Boot Loop)

I tried many different versions SP Flash Tool but without a good result.

Only when I use SP Flash Tool v5.1416 phone is working (play boot sound, buttons illuminate when it touches), but the screen is all time black.

Phone orginal rom information:
Hardware: MT 6592
Model: Lenovo S898t+
Build number: VIBEUI_V1.5_DEV_S898T+_SJROM_CN
BUild date UTC: 20140508-055358
Android v: 4.4.2
Baseband S898.ROM.V101, 2014/04/03 11:42
Kernel v: 3.4.67 (buildslave@shws45) (gcc version 4.7 (GCC)) #1 SMP Tue Aug 12 18:52:27 CST 2014


Please help because I do not know what I can do !!!!