SOURCE: lcd tv backlight prob
You need to replace the inverter board if you can find the spare part. Otherwise you need to replace the whole lcd panel.
SOURCE: LCT 2662 after caps replaced I loose backlight.
make sure the caps you installed are the exact replacements. Changing voltage capacity or timing will cause the circuit to fail.
SOURCE: I have samsung lcd lnt4661 model. I had problem
Hi,
There are two possibilities for back light off after 2 seconds.
One reason is back light inverter boards got defective for some reason (this tv has 2 back light inverter boards on either sides) and second possible cause is power supply is not giving out sufficient voltage supply to back light board.
Let me know your expertise level to provide you more technical info.
Thanks.
SOURCE: 2003 samsung HLN5065w DLP TV
Sounds like power supply fault in TV. Need to take to TV repair shop.
SOURCE: lg led tv backlight
Fault with its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
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