The picture left shows central control circuit is faulty. Adjust RP410, Center, no change, and no characters appear, can judge a character display circuit is not working properly. We know that the characters display circuit normal operating conditions are: 1) by C606, composed of C607, L602 character shows the oscillation circuit is working properly; 2), the field position pulse into the CPU (ST6367). Both phenomena occur simultaneously, description taken from the line output transformer ⑩ feet of line retrace pulse is not normal, or its transmission circuit is faulty. See figure and voltage with multimeter measuring AC 50V retaining a OV (normal values for 20V), R408 measuring voltage 39.5V the right side of (normal), the R408-circuit. Replace the R408, power on everything.