Standby Led Blink; Troubleshooting - Sony KDL-32R420A Service Manual

3-2. STANDBY LED BLINK

1) 2 times blinking (Main Power Error)
2-time blinking
Check REG+12V at
NG
CN201_Pin-3/8 on
Main board
(11.8~13.2V)
OK
Change
Main board
KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK)
>=2.6V
Check PSU_EN# at
CN201_Pin-6 on
Main board
<2.6V
Change
Main board
Check the harness
OK
PSU to M/B
connection
NG
Fix the harness
connection
TROUBLE SHOOTING
Replace the harness
NG
between PSU and
Main board
Symptom
OK
improvement
Harness issue
Change
PSU
22