Baird B42HDTV, Service Manual

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11. TROUBLE SHOOTING GUIDE
11.1. Simple check
No Picture,no sound
Verify if the television is properly plugged
Verify if the television is properly supplied power
Verify if electricity is available
Blank screen
Verify if correct signals are input
Press INPUT button to change signal input to TV input
Restart the television of power supply is interrupted
No sound
Press Mute button and verify if Mute mode is set.
Switch to otger channel and verify if the same problem happens.
Press VOL+ button to see of he problem can be solved.
Poor sound
Verufy if sound system is correct .Refer to some chapter for
adjust.
No picture in some channel
Verify if correct channel is selected.
Adjust the antenna.
Make adjustments by Fine Tune and MANUAL Scan.
No color for some channel
program(black and white) Verify if the same problem exists in other channels.
check out of picture and sound system.
Refer to relative instructions in the Manual for color adjust.
Spots with some or all pictures
Verify if the antennal is correctly connected.
Verify if the antennal is in good condition.
Make fine adjustment of channel.
Horiaontal/vertical bars or picture
shaking Check for local interference such as an electrical appliance or
power tool.
Television out of control
Disconnect the television from power supply and 10 seconds
later,connect the television to the power supply.If the problem still
exists,contact authorized after-sales service for technical
assistance.
11.2. Main board failure check
State:No picture
First,check cables which connect with PSU
，
then check as follows
Check input voltage
voltage: +5VSB
→ POWER ON(2.6V) → +12V
connector: XP600(P3) → XP600(P1) → XP600 (P7,P8,P9) → CN4(P2,P3,P4,P5) → XP602(P1)