Service manual

L9C Monitor
L9C service manual Page 47of 48
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2.No Characters , Missing one color
No Characters or Missing one
Check CN6 12V Output
Change Power Board
Check L33 , 5V Output
Check or Change U21,Q13,Q17
Check L34 , 2.5V output
Check or Change U22
Check L31 , 3.3V output
Check or Change U23
Check CN9 to Panel Signal Output
Check Inverter
From Power
board OK?
Change Power Board
Check X’Tal 11.059Mhz and 14.318Mhz
Change X1 or X2
Check H,V SYNC?
Check or Change Cable or Panel
Change VGA Cable