Question about LG 42LW4500 3D LED Television SWV3432S/10 HDMi Cab- 24 Carat goplated

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LG42LW450U wIll not switch on

When I push the power button, the light is red. The red light will then get brighter, pulse once, then dim, then get brighter once more. The light then turns white as normal but will then switch off. I've had the PSU out to have a look at the capacitors but cannot find any that have burst or leaking. I can hear the relay clicking on and off as it normally would. I've given the PSU a clean in the hope that this might be the cause but no cigar. Can anyone give any advice on what might be the cause before I go and buy a new PSU. Oh yeah, the TV is 18 months old

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  • Clive Betts
    Clive Betts Nov 21, 2013

    I tried a new PSU but the problem persists which indicates it is coming from the mainboard. Now, It has been quite difficult to source the mainboard for the 42LW450U, in fact, I've not yet been able to buy one. However, I've noticed that the mainboard layout of the 32LW450 is exactly the same - minus the side metal bracket. Every chip is in the same place, to anyone they would think it is the same board. What I need to know before splashing out on one is whether or not this one will work.

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  • LG Master
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The problem could be something other than a dirty PSU, such as failed components that can't be detected by visual inspection.

Posted on Nov 17, 2013

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