MITSUBISHI ELECTRIC WS-48513 - Manual (Page 39)

3-9
If the LED does not flash:
• Check that the DM board is seated properly.
• Check that there is Standby 9VS (Fig. 3-2).
• Check that the SUB-POWER command line
does not go High (Fig. 3-5).
• Chirping sound - check the Standby Regulator,
IC9A20 (Fig.3-5).
• If it Turns On then Off
-Check the ±24V fuses
-Check Horizontal Deflection Circuitry.