BUG SCREEN MPC 60 VIMANA 3.15B

Hello,
i just added a new bone in my mpc 60.
I installed the vimana os 3.15B.

It seems to work, I charge and save on my SD card.

Sometimes I have an anomaly on the screen information disappears and then return after a few seconds or minutes sometimes.

that is strange, can you describe that a bit further? I don't use SD cards, but i am still curious what you did to make that happen.

I change the os by myself with a eprom. I buying it from eBay.
Maybe this problem are from the EPROMs ?

everybody who has vimana bought it from ebay and changed the eprom chips... i am asking for more details about the problem.. because i am not sure exactly what the issue is.

I know where the problem from. I open the mpc and I the problem stay when I deconnect the backlight.
Maybe the disconnection come from the big napp black connected to the main board.
Sorry my English it’s very bad but I try to do my best.