Just having GRAY SCREEN after flashing stock rom

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If anyone could help,

I decided to flash a stock lollipop rom for AIO-ROW. Using SP Flash Tool, I formatted the WHOLE FLASH. After that, I flashed the stock rom (with scatter file) using the DOWNLOAD ONLY option. The flash was successful and the phone boots now (Because when I formatted the WHOLE FLASH before, the phone doesn't boot and led doesn't work when plugged to electricity), but I only get GRAY SCREEN and I can't do anything. The phone still charges because the led indicator lights up when plugged to power. Is there a fix for this? How can I fix this? Please help me and thank you :D