Hitachi 53FDX20B 53" Rear Projection Television "crt tv losing brightness" Questions

...need cleaning also the mirror. do you see multi images if so maybe the convergance may need resting and the focus may be out . This tv is getting old now and the crt's may be losing there ...

...tv- and could i repair it myself. Thank you. The Picture tubes(not bulbs) do and probably are weak. There replace should only be done by a trained service person. One reason would be the hI Voltage ...