ok, tried flashing my 3790T us 4.90 to chn 2.2. Everything boots up fine but my touch screen won't respond after map loading. reverted back to us version and everything is working fine. Can't figure out what i did wrong.

1. use rgn tools to copy my orignal boot bin from gupdate
2. use rgn tools to make rgn file from other chn gupdate. by loading orginal boot bin and the rest from chn_gupdate file.
3. load it in with garmin updater.