VIORE PDP4210EA Service Manual page 108

4. Trouble shooting.
line defect from each parts
• Case 1: Buffer IC fail
COF IC 1,2 ⇒ 192 line(96+96) open.
COF IC 3,4 ⇒ 64 line open (with fixed interval there is on,off ....... Repetition)
• case 2 : Array resistor fail
COF IC1 ⇒ 16 line , COF IC2 ⇒ 16 line open
• case3 : COF IC fail
96 line open.
/40
16 line open
96 line open