Samsung 04 trobleshooting free download

File name 04_trobleshooting.pdf

4. Troubleshooting 4. Troubleshooting 4-1. Troubleshooting 4-1-1. Previous Check 1. Check the various cable connections first. - Check to see if there is a burnt or damaged cable. - Check to see if there is a disconnected or loose cable connection. - Check to see if the cables are connected according to the connection diagram. 2. Check the power input to the Main Board. 4-1 4. Troubleshooting 4-1-2. No Power LD550_LD450_26" 32" 37" 40" 46" - The LEDs on the front panel do not work when connecting the power cord. Symptom - The SMPS relay does not work when connecting the power cord. - The units appears to be dead. 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: Major Check - Check the internal cable connection status inside the unit. points - Check the fuses of each part. - Check the output voltage of SMPS. - Replace the Main Board. Lamp (Backlight) Off, No Change the 14p power cable. power indicator LED off? Yes Lamp (Backlight) Off, No Change INVERTER / power indicator LED on? BALANCE Board. Yes Does proper Stand-By DC A5 V appear at No VIA - A5 V_PW? Yes Diagnostics Does proper Main DC B13 V, B5 V appear No at VIA - B13 V_PW, B5 V_PW? Yes Change the Main Assy. Does proper DC A3.3 V appear at VIA - No A3.3 V_PW? Yes Does proper B3.3 V, B1.5 V appear at VIA No - B3.3 V_PW, B1.5 V_PW? Yes Does proper DC B13 V appear at LVDS No connector Pin #1~5 of T-con board? Change the LVDS cable. Yes Does proper DC B13 V appear at F1 of No T-con board?