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Troubleshooting
This chapter provides troubleshooting information for the B243W:
1. No Power
Cha
p
ter 4
No power
Press power key and look if the
picture is normal
Please reinsert and make sure the
AC of 100-240 is normal
Reinsert or check the
power section
Check if X401,X402 oscillate
waveforms are normal
Measure U701, U702 Pin2=3.3V,
U703 Pin1=1.8V
OK
OK
NG
NG
NG
Measure CN701 Pin1=12V?Pin5＝5V?
Replace U403
Replace X401,X402
OK
NG
Replace Power section
Replace U701,U702,U703
NG
OK