4-2. How to Check Fault Symptom
NO Power and No Video
Symptom
The LEDs on The front panel do not work when connecting The power cord.
•
The SMPS relay does not work when connecting The power cord.
•
The units appears to be dead.
•
Major
checkpoints
The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are
improperly connected or the Main Board or SMPS is not functioning. In this case, check the following:
Check the internal cable connection status inside the unit.
•
Check the fuses of each part.
•
Check the output voltage of SMPS.
•
Replace the Main Board.
•
Diagnostics
Power cord on.
No
Check a connetion power code.
Yes
Check ‘Stand-By A5.3V’ 5.3V appear at
BD210?
0V to 5.3V (CN201 #4)
No
Change 14p cable.
Change Main Power Assy.
Yes
Check ‘SW_POWER’ more than 3.3V
appear at CN201(#2) ?
0V to 3.3V↑ (CN201 #2)
No
Change the Main Assy.
Yes
Check ‘Power input of Main Ass’y’ ?
DC B13V, B5.3V appear at BD212,
BD213 : B13V BD210 : B5.3V
No
Change 14p cable.
Change SMPS Ass’y.
Yes
Check ‘Power of main IC(B1.2V/B2.5V)’
Check ‘Power of DDR IC(B1.5V)’ appear
at IC206 : B1.2V / IC204 : B1.5V IC202
: 2.5V
No
Change the Main Assy.
Yes
Check ‘Power of LVDS (13V)’ appear at
TP-PANEL_VCC?
No
Change the Main Assy.
Yes
Please, Contact tech support.
Caution
Make sure to disconnect the power before working on the IP board.
4-3
4. Troubleshooting
