I have an LG DVD and stereo system LG-Ht33S or HS33S.
It arrived making a terrible loud high pitch noise from the subwoofer, which house the power supply board.
The dvd gets power through a cable from the Sub, it originally had a red standby light. You press the on button to switch it all on the dvd would start up and then the loud high pitch noise would come.
So I entered the subwoofer and found a capacitor? page 44 l606 on the PWM circuit that had bad solder joints, literally dropped off. Check it for a short and it tested like the l605 with continuity. Resoldered it.
Now I get absolutely no power on the dvd no standby light.
No voltages out of the power supply board to the others.
I have the power supply board on its own, and trace 340vdc to the two ICs 901 and 902 and nothing comes out after.
I am really looking for any tips for this. What to test and what to do.
Service manual and schematic is attached.
http://elektrotanya.com/lg_hs33s-a2p_afn70208657.pdf/download.html
