Samsung UE32T5302 - Broken I changed the LCD FHD To HD, but I have an ISSUE

Hello

Please help me. I bought a broken samsung UE32T5302 smart TV. I thinked, I can change the screen for my FHD lcd from another samsung. But, it was not easy, becuase it is fixed for backlight. OK, not problem, I have more HD lcd. I replaced the broken lcd for my like a new HD lcd.
I made a new LVDS cable, for this LCD.. I watched on a mainboard, I found 1 option bit for FHD/HD, I changed it for HD.
Everything is OK. But not.
The TV is goes very well, wifi, smart, menu fine.
But. I wanted to use it like a TV.- Opps.
When I use HDMI, there is an ISSUE. The screen is like zoomed.
I think, I can see 1366x768 windows from FHD (1920x1080) picture . I don't know why.. I changed the resolution, the menu is perfect. I thinked the HDMI is not good..
I downloaded 25q40 and 24512 dump for 32T4302. I programmed, but no changed. OK. HDMI is KO.. But, I can use it.. I wanted to try MKV from pendrive. Like that HDMI. The TV is OK, the media player screen is OK, but the film is zoomed like HDMI. I thinked, the HDMI Edid is not good, but no.. All of video is zoomed..
I think, I see 1366x768 window from 1920x1080 picture..
What can I Do? I didn't find a service manual.. The T4302 is HD.. T5302 is FHD, but I think not a different the 2 panels...
I changed a 25Q40 and the 24512.
What Can I changed?

Thanks
Laci from Hungary