Image file not booting

[baher4ever]

I've started building my CM3 yesterday and ran into several problems. The device was booting but non of the buttons (X,Y,A,B) were working 
I had to disassemle again and repeated  the soldering and gave it a trial before finalizing and buttons were working.
I was happy that finally i finished my build. After finishing i tried to boot but gives me a white screen although this is the same card I've been testing with.
I tried another card (the first one was 32GB i tried a 64GB  card) it doesn't boot at all. I use Etcher for writing the image files. I took a 200GB out of my retropie build and burned the CM3 rom on it and it didn't work as well. The 32 GB card I can hold power and it shuts down (even though it is displaying white screen) but for other cards I have to take the battery off.
Any idea what's happening there. I'm not deeply into programing so If anyone can help me find ready build to download I will be thankful (of course after solving my issue) 

[Flavor]

Happy Easter!

Could you post a photo of where the LCD's ribbon cable plugs into the Freeplay CM3 circuit board? I would expect that it's not 100% locked down properly.
https://www.youtube.com/watch?v=sch5ZW1idz4
I know that's a poor/old video. I should make a new one.

You could also check the seating of the Pi, if that doesn't help.
https://www.youtube.com/watch?v=Hn_pFBwEQxA

Also see http://freeplaytech.com/troubleshooting for other things to look for when you get a white screen.
http://freeplaytech.com/troubleshooting

Also, tell us which image file you're using. You mentioned multiple SD cards. Are they all running the same image file?

[baher4ever]

Thanks for your reply
the lcd cable wasnt hooked up perfectly
i have another question please
i already have images for my retropie 3b+
i found a way to extract the image on windows and now i have access to all the art work and roms
i managed to transfer Snes Gba Gb Megadrive N64 and neogeoNeogeo 
is not working it exits
i copied all the bios images from my previous image to my freeplay
n64 also is not working
my other question how to save state and load state
i know that i have to press select and right trigger to save and select left trig to load
but i only have left shoulder and right shoulder i dont have triggers
there was an. Option in my old image to automatically save when i Exit the game
and when i open it loads the state automatically as well
how can i use this option
thanks in advance and happy holidays  

Happy Easter!

Could you post a photo of where the LCD's ribbon cable plugs into the Freeplay CM3 circuit board?  I would expect that it's not 100% locked down properly.
https://www.youtube.com/watch?v=sch5ZW1idz4
I know that's a poor/old video.  I should make a new one.

You could also check the seating of the Pi, if that doesn't help.
https://www.youtube.com/watch?v=Hn_pFBwEQxA

Also see http://freeplaytech.com/troubleshooting for other things to look for when you get a white screen.
http://freeplaytech.com/troubleshooting

Also, tell us which image file you're using.  You mentioned multiple SD cards.  Are they all running the same image file?