RCA 46LA45RQ 2 seconds to black

[eagle00799]

Hi everyone, I took the back off this tv and checked voltages after failing to see any noticeable bulged caps or burnt components, All voltages out of the power supply are good so I did the bulb trick and held the bulb over all the inverter outputs. On the 3rd and 4th output starting from the top going down the bulb lit but noticeably dim and weaker than the rest. This inverter board seems hard to find so I would like to repair it at component level. Should I go ahead and replace the top transformer or is there something else I should check also? There is a what appears to be a smaller transformer?? just below the top transformer that runs between the 1st transformer and the 4th output, not sure how to check this. Where can I find replacement transformers as I would like to replace all 3 and what else should I look for?

[hawaiianeye]

Re: RCA 46LA45RQ 2 seconds to black

why did no one respond? what did you end up doing? i have this same tv now but it doesnt have 2 seconds to black its more like 2 minutes to black...and the backlight flickers worse and worse until it turns off. also i notice one area seems dark like a bulb is not being lit all the way... do i have inverter or bulb problems? i was able to find the inverter for less than 20$ so ill probably gamble

[freakaftr8]

Re: RCA 46LA45RQ 2 seconds to black

Inverter would be the easiest to do. If it turns out to have the same issue after changing it I would assume a bulb issue. This would require disassembling the panel to get at the bulbs.

[johnboy1313]

Re: RCA 46LA45RQ 2 seconds to black

hawaiianeye, take the back cover off. In the dark, turn the set on and watch the transformers on the inverter. I bet, as the lights begin to flicker, you'll see an arc inside one of the transformers. I had the same problem as the OP. It took three or four inverters to finally solve the problem. They are junk, unfortunately.

[Teflonbandit]

Re: RCA 46LA45RQ 2 seconds to black

I have the same inverter board and the coils are burnt in a similar manner. Last wrap on the end of the coil is gone and the plastic is deformed. I have higher resistance across that set of tabs on the output of the board. I am currently looking for a replacement board but have a ssi460_12fo1 Rev0.2 board. Not many for sale right now so I'm also looking for the coils. Anyone know where to buy the coils? I'm new to the forum so I was looking to get some sites to buy parts. Thanks

[Teflonbandit]

Re: RCA 46LA45RQ 2 seconds to black

Forgot to mention the board is a Samsung LJ97-03319A. Off of the RCA 46LA45RQ tv.