Model DSC-T11 2004 why now the photo background is pink color and dark? where I can send back for repair? I bought it in Hongkong during my trip but living in Germany

SOURCE: my camera sony DSC-55 shows a pink background and

You have a problem it seems with the circuitry of the camera. This camera is too old for warranty, so I would suggest to try to set the menus to original or factory settings. Then test it.
If that does not fix the problem, do some testing further. Get a card from another camera and play it back on this one. If the picture is good, then the problem is in the ccd to the circuit system. If you can see the menus with the correct colors, then suspect ccd sensor. If the bad colors are always there, then you can suspect a few things, one, the LCD could have bad connections or is bad otherwise. If you see any good colors from the menus or playback, then that part of the camera is probably good. And there could be bad or failing parts in the circuits if colors are always bad no matter how you test it.