Tektronix Oscilloscope 2215.

[pan]

Hi All

My oscilloscope has developed a fault.
It happened when doing measurements on a LCD.
The fault is when now turned on the display shows a small circle of light size of a 5p coin.
When I hold the Beam find button in a small line (about 2ins) does appear.
Can any of you guys help?
Even if to give me details of a repair company which you can recommend.
Thanks
Pan