Any ideas? Sammy PN4B400 standby light but won't turn on

[sugar_ray]

Older Sammy plasma may be worth saving? Standby light but won't turn on. Swapped power supply board with known good replacement. No change. Unplugged the Y sust. Harness to take it out of the equation then powered up. still no change. Same thing with the Z sust. no change!!

Is it feasible that the inverter (filter as it's labeled) is shot? I'm referring to the silver block that the plug goes into, from there it feeds the PS board. Successfully repaired a few LCDs but plasma different animal.

Appreciate all feedback

Cheers

[Andrew F. Ali]

Re: Any ideas? Sammy PN4B400 standby light but won't turn on

Hardly likely...These are made very robust.....When the VS is disconnected from the Y-SUS the PSU will not turn on. With everything reconnected...when you plug in to 120Vac are you hearing a 'click' from the PSU?....If so most likely the PSU is good...If not then PSU is bad...No 'click'...Check for open fuses and/or short circuits on PSU....If 'click' is heard...disconnect the jack from the PSU to the Y-SUS Bd......then connect two (2) 120Vac light bulbs in SERIES and connect it to the jack going to the Y-SUS Bd across the points marked VS and Gnd....Plug the TV to the 120Vac and the light bulbs should light up bright if PSU is good. (It may take a second or two for the light bulbs to turn on)...Hope this helps.

[ReeceyBurger123]

Re: Any ideas? Sammy PN4B400 standby light but won't turn on

hardly likely...these are made very robust.....when the vs is disconnected from the y-sus the psu will not turn on. With everything reconnected...when you plug in to 120vac are you hearing a 'click' from the psu?....if so most likely the psu is good...if not then psu is bad...no 'click'...check for open fuses and/or short circuits on psu....if 'click' is heard...disconnect the jack from the psu to the y-sus bd......then connect two (2) 120vac light bulbs in series and connect it to the jack going to the y-sus bd across the points marked vs and gnd....plug the tv to the 120vac and the light bulbs should light up bright if psu is good. (it may take a second or two for the light bulbs to turn on)...hope this helps.

+1

[sugar_ray]

Re: Any ideas? Sammy PN4B400 standby light but won't turn on

Thanks gents
Will give it a whirl