DLP660TE: DMD displays checkerboard pattern while in projection mode: external

Part Number: DLP660TE
Other Parts Discussed in Thread: DLPC4422, DLPLCRDC4422EVM

We encountered a similar problem when using the DMD DLP660TEVM and a DLPC4422 controller. 

After using some different test patterns we can not get the dmd to display the connected external source correctly. The problem looks exaktly like described in the related question. We tried all proposed solutions, but none of them worked. 

I hope we can resolve this issue. 

Best Regards,

Florian