If you're an expert on transvestites, I'm sorry, but that's not the sort of help I need. My flatscreen LG TV has started to be difficult to start, taking several manipulations of the on/off switch before it will pick up the signal from the box and come on. When it does come on, picture is all broken up for few seconds before the proper picture is delivered (this is also a new development). When it's working properly, it makes a sort of "thunk" when you switch it on. It won't get a picture unless there's a "thunk". I know it's 9 years old, but I am loathe to chuck it away if it's something really simple like the on/off switch. Any thoughts? Works fine when you do get it to turn on and so far, it's always been possible to get it to turn on. But I suspect that quite soon, it'll stop all together. I know the general rule these days is to just bin it and get another as repairs are so expensive. Do TVs have a relay in the on/off switch? I understand little about relays and next to nothing about consumer electronics. Thanks.
You're lucky it has lasted 9 years......... LCD and LED TVs are virtually the same as PC monitors and few of them last much over seven years.... The thunk is commonplace on CRT TVs and when there was no thunk, the TV would not work........IIRC it is the internal transformer that makes the thunk.........unless of course, Glidd you are being economical with the truth about the age, and it is the valves making the noise. If I were you, chuck it. AL
Switch it on and off at the wall socket, without touching the on/off switch on the TV. Does that make any difference?
Glid Sounds very much like the problem I had with my flat screen L.G T.V. Turned out to be breakdown of the capacitors in the power supply module. The repair man that examined and fixed my set, informed me that this was a common issue with LG sets. I watched him fix it so I know exactly what he did which was to unsolder and replace about 8 capacitors on the power supply board. Cost me about £60 to have it repaired, including the visit from the engineer. No further problems since.
Well, it did seem to. Yesterday, no amount on on and offing seemed to work, so I yanked out the power cable. Put it back in, and then managed to get it started. I couldn't be certain that it started first time, though, but it did seem to do the trick. Could just be random. Not enough data! I may well replace it but repair it anyway. Perhaps having a second TV in the house may come in handy one day, but this is not one of those places with a TV in every room.
That's what I did..........bought a new one; had the old one repaired; then herself went and won one in a raffle. PS....As John says, it seems to be the power supply that fails more often than not in LED and LCD TVs and monitors, although I have had two monitors fail recently, that had external power supplies. The cost of repairing them was a minimum of £85 + VAT each, plus parts and the additional labour.........I chucked them....cheaper to get new ones (although there were nice black glass ones with no surround. Lucky I still had two more that are still working. AL
If I do replace it, anything I need to look out for in a new one? I'd be looking to get about a 100 cms one. I see they come in different Hz - 100, 200 or 600. Is that important for picture quality? (suspect it is). And I imagine I need an HD one, or are they nearly all HD these days? I'm not a home entertainment buff. I won't be connecting it to full surround sound or any of that caper. Have heard that Samsung and LG are good for the money (keen not to pay too much). Thanks guys.
I have also just dumped two CRT TVs in working order.........and I have two more monitors spare, in case my main two go down. The TV I bought is a Samsung......I looked at LG, but felt Samsung was better all round. Be careful of Digihome......(like what herself won)........Indian and no support in the UK and I doubt if there is elsewhere.
Just about every piece of electronic equipment uses switch mode power supplies these days as they require no large transformer so are cheaper to make and are lighter. They nearly all fail through the capacitors breaking down sooner or later. My DVD player packed up last week for exactly that reason. I'm swithering whether to source the capacitors, a couple of quid's worth, or just buy a new one.
Thats what happened to mine too got one of these and fitted it myself it was pretty easy and worked flawless from then on. If you do it make sure you buy the right kit for your model . Repair Kit LG 37LC2D UE LCD TV Capacitors Only not The Entire Board | eBay
I have found this complete board on the Cove of Fleas for a measly £12 + postage. MAIN BOARD FOR LG RZ-30LZ13 30" LCD TV LC-30IE10 | eBay Will that contain the capacitors that likely need changing? If so, it's a simple straight board swap. Worth trying for such a feeble investment. Thanks.
I think that is the wrong board mine looked similar to this . The capacitors are in the bottom right of this picture the knackered ones will be bulging at the top they are very easy to replace you just unsolder from the other side and re solder the new capacitor in . I would buy the correct kit for your lg telly model and replace the ones that are bulging . Easy .
That's the main board (like the ecu in a bike), the one with the capacitors is the power supply board. You'll need to take the back off the TV and get the part number of the board, even externally similar TVs with the same model number have different components inside.
Glid I would have replaced the capacitors myself had I had know about the Kit that Ducati2242 mentioned. I'm sure a man of your talents would find it very straightforward. Don't know how much soldering experience you have, but it's really not that tricky to do.
Many thanks for the replies. What I might do is just try and find the capacitors without bothering about the board. Very useful to know that the eBay board is the wrong one. It's ironic. My old man was an electronic engineer who spent his life with a soldering iron in his hand. His son has never soldered anything. But it's fine. I know people who do and have the iron. Will just need to take the back off, find the dodgy capacitors (I've heard about the bulging from a video on YouTube) and replace as suggested. I'll let you know how I get on.
I just replaced the bulging capacitor in my DVD player PSU with one I had in a box spares. It is working perfectly again. Cost nothing. Result
