Switch oled error 2162-0002

Hello to all.
I have a nintendo oled board with error 2162-0002.
the console run second stage and later stop on this screen with this error.
I have changed the mt92, bq and reflow cpu and emmc but without success.
I have controlled all line to cpu from mt92 and restore 2 line that are cutter.
What i do more again?
Thank for any suggest and sorry for my bad english