Philips 20MF251W-27 Service Manual page 13

5.3.2 No work / LED is red
No work / LED is red
Check if RMC
PCB is normal
Yes
Check if voltage of
N16,N26,N30 is normal
Yes
Replace Main PCB
5.3.3 No raster / Picture too dim
No raster / Picture too dim
Check if connector
CN1 of HV power PCB
pin1,2,3,4 is 24V
Yes
Replace LCD panel
Service Mode, Error Codes, and Faultfinding
No
Replace RMC PCB
No
Replace N16 or N26 or N30
No
Check if voltage of
HV power PCB IC1 is normal
Yes
Replace LCD panel
SHA2.0U LA
No
Replace HV power PCB
5. EN 13