TCL 21F1 NX56E-LA - Trouble Shooting; Fuse Blown and Raster Issues

Colour Television Chassis:
Fuse Blown
Is the drain of
Q801 shorted
to earth?
Ye s
Cheek /
Replace
Q801
Is D801~D804
OK?
Ye s
Check IC801 and
the peripheral
components.
Replace
D809~D812
No
No
Figure 1 Fuse Blown
No raster
abnormal + B
Is the + B,
resistance to earth
ok ?
Check the load of
B+
No
Ye s
Check Q402 collector C
resistance to earth ok?
Ye s
Replace Q402
Figure2 No Raster Abnormal +B
NX56