I have just switched off my matsui 42p900 tv to move it,and now when i have plugged it back in the standby light is not coming back on,the fuse is ok,i had the same problem last year when i switched it off to go on holiday but i cannot remember how i got it back on

Could be a failing power supply

Try pressing the small reset button on the back, it works, and you will not loose any stored information which caused the unit to go in the stand by mode.

or
Have you tried turning it off for an hour and then turning it back on. This happens to me quite often and leaving it off for a while ususally allows it to come back on. Also have you tried to press the TV/AV button on the remote as sometimes it switches to TV mode when its on standby and then standby won't work as its on TV mode and needs to go back on to AV mode. Basically just press the AV button on the digibox remote and then try standby.

or
if the batteries are removed and left for about 20 minutes before being replaced again, everything works as it should.
or
if any of the above suggestions does not work then you have to open the unit and on the main board of the tv there is a thin mini tube light like component called fuse you will have to replace that fuse .the fuse is very very cheap and you can easily get it at any electronics shop.and if still the unit does not work then there is a major fault in the power supply board and should be taken to the service center for diagnosing the fault that it is repairable or not.but i hope the above information provided will definately help you to solve your problem.

there is some voltage regulation problem in your tv ......

You have power supply trouble that needs to be corrected

What you see is a protection mode. Change input device to some other like a DVD player. Switch off TV, switch off power, remove plug and wait for 48 hours and retry. If problem persists, call in a qualified service technician.

most LG have a "vacation switch" on the bottom right hand side of the set very near that standby light.

it is placed poorly, where you can accidently click when grabbing the TV to move it or swivel it.

it is a toggle switch, a "master power" switch.

you may have bumped it to the off position. flip the switch, your standby light will come back on.

Hello,

Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Take care .......

Same TV, Same problem, help please

It's same as Matsui 42P900 i.e. 0471

Yes it is hdtv,, and its digital also ,, a very good tv ,, glad 2 help.. good luck