Tektronix Oscilloscope 2465B

Hey all,

I haveTektronix Oscilloscope 2465B, the device has 2 problems.
1. on statrup it sticks on "ADD" led, after I press A/B TRIG it start working.
2. there is nothing on the screen. no beam and no numbers.

Does anyone know how to fix the problem, I have another scope, so if I need to measure something inside, there is no problem.

thanks ahead.

I'd suggest finding the service manual for it. It will have flowcharts and stuff for debugging.