le46m87bd no backlight help please

[wreksta]

Help with inveter fault
Samsung le46m87bd

When tv is turned on the unit comes on then the master inverter makes a a buzzy cracking noise and the backlight switchs off any ideas no burn marks nothing popped is there a way to determin which transformer on the inverter is dead or causing the backlight shutdown

Any ideas
Thanks

[tom66]

Re: le46m87bd no backlight help please

Could be arcing inside LCD panel - shorted bulb/bulb connector. Take an energy saving bulb (CFL) and put the light end near each transformer output - whichever does not glow may be bad (or the output is shorted inside the panel)

[wreksta]

Re: le46m87bd no backlight help please

Tom can you explain this test please mate I don't think its a short I think one of the transformers is dead mate

[tom66]

Re: le46m87bd no backlight help please

I've explained it all.. Take a CFL and put it near each trafo. It will glow in the presence of high voltage. That will tell you where any fault is. If no glow - bad trafo or arcing lamp