I am at a loss as our beloved sony tv has developed a couple of issues

firstly the screen image is very dark i noticed this one evening when watching a dvd, i have tried to adjust the levels using a calibration tool on a pixar bluray but i am not able to adjust the brightness or contrastlevels sufficient enough to even see the test images let alone perfect them.

The other issue is the image retention that was first noticable when after viewing the EPG the straight lines were visible on the screen when watching tv channel etc this would dissapear after a short while of mooving images but has also got to the point that when any fixed image is shown on the screen it takes a while for it to be errased which is very distracting.

as the tv is just out of the extended 5 year garantee i am looking for assistance that will not cost the earth.

thankyou