My tektronix 2465B DMM is in trouble When turn power on, the TRID D flashes and the CRT is off. Pressing A / B TRIGER several LEDs light but the CRT remains off. The voltages + 5V, -5V, -8V, + 10V, + 15V, -15V, -42.4V and + 87V measured in J119 are correct. Can someone help me? Paulo