Samsung BN44-00622B Relay Keeps Turning On-Off





How to fix: 5V is normal.

1. QS881 2N7002 MOSFET is good.
2. Supply voltages is flashing.
3. If there is 5 volts at 25th pin of IC9101 OR IC9201 relay will keep flashing. You should desolder JP859 to find out which one is bad IC.
4. You should also check if the LED backlights have fail or not.

IC9101 is testing for LUVP 18V
IC9201 is testing for LUVP 23V

You can download the schematic of this board here: www.electronica-pt.com/esquema/lcd/bn44-00622b-73546/