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LG RZ-15LA70 - powers down within first minute

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mickm:
When my LG RZ-15LA70 is plugged in and switched on everything works as normal for the first 20-60 seconds at which point the TV powers off. The TV will not power up again for some time afterwards. I suspected something was overheating.

On opening up the back I found that U101 (PN: TOP246YN) AC-DC switching power convertor became very hot within the first 10-15 seconds. Is this normal? I was tempted to just replace this component but it may well be that the problem is due to another component on the power supply board.

I can order and replace this component for less than £5 or replace the whole board for around £45.

Any advice or further insight...?

mickm:
Still no remedy for this issue... Anyone..?

brainstorm:
Hi Mick,

I have had this fault a few times and sometimes changing U101 cures the fault, but sometimes it doesnt!
I tried ringing LG but they just tell you to change the board!

So I think its either chance your arm and change the IC or scrap it(or EBAY it)

Hope this is of some help

Brian

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