My set makes a sharp snaping sound from inside and the picture
goes black for about 5 seconds and them comes back on.
It will sometimes do this every 30 second and at other times
it may be every half hour or hour apart.
It did this about a year ago and the seller came and installed
a small black chip that corrected this, but they are not
in business any longer. At that time they said this was a
fairly common problem and they indicated they had to install
some form of new board to cure it permanetly, but they didn't
and now they are gone. If anyone has a similar problem and
fixed it please advise what you did.
Thanking you in advance
GSimms
Since I posted this problem, I have fixed it myself. Out of frustration, I unpluged it, removed the back panel and blew all the dust out of it using an air compressor for higher pressure. (tv was used when I got it) So far I have not had a recurrance in 6 months. It seems that the accumulated dust was causing an arcing somewhere. It may not solve the problem for everyone but it worked for me.Since I posted this problem, I have fixed it myself. Out of frustration, I unpluged it, removed the back panel and blew all the dust out of it using an air compressor for higher pressure.
(tv was used when I got it) So far I have not
had a recurrance in 6 months. It seems that the
accumulated dust was causing an arcing somewhere.
It may not solve the problem for everyone but it
worked for me.
Shortly after I posted this, I decided to investigate the problem, so I unpluged the unit, removed the back and found there was a fair bit of dust inside. I got a dry air supply and blew all the dust off of the electrical components, avoiding contacting anything with the air nozzle. There was quite a bit of dust inside that you couldn't readily see. After putting the back panel on, I plugged it back in and its been running flawlessly since, thats almost 4 years now. It seems the noise was an electrical arc jumping across a dusty circuit.Shortly after I posted this, I decided to investigate the problem, so I unpluged the unit, removed the back and found there was a fair bit of dust inside. I got a dry air supply and blew all the dust off of
the electrical components, avoiding contacting anything with the air nozzle. There was quite a bit
of dust inside that you couldn't readily see. After putting the back panel on, I plugged it back in and
its been running flawlessly since, thats almost 4 years now. It seems the noise was an electrical arc
jumping across a dusty circuit.
You can't post conmments that contain an email address.
One of the high voltage anode connections is arcing, usually as a result of sealer (rtv) having been incorrectly applied during manufactor. this may be repaired by a tv tech with application of rtv, or the crt may need replacing.
DO NOT TAKE THIS TV APPART!! THE HIGH VOLTAGE ARC COULD BE VERY DANGEROUS.
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? 5:29
https://www.youtube.com/watch?v=PWoz_-3OHIM
Jan 25, 2013 - Uploaded by Tampatec
Common LG LCD TV REPAIR - NO PICTURE OR BLACK SCREEN FIX ... I have a LG 42PM4700-UB plasma tv that justwent black. The red ... I had to keep turning on and off the TVseveral times for the screen to come back.
? 5:56
https://www.youtube.com/watch?v=xUzCLgoSPGM
Sep 15, 2014 - Uploaded by ShopJimmy.com
LED & LCD TV How to Diagnose Symptom of No Image on theScreen CLICK ... Tv was working fine when left to go to store and came back to blank picture and ... my samsung tv it turns on but its completely black and no sound at all ... LG LCD TV REPAIR - NO PICTURE SCREEN FIX REVIEW - Duration: ...
I believe he is right about those models being basically the same. They often make small changes like the layout of connectors so that they can have different models to sell to each store. It defeats the "price matching" ads some stores use.
It sounds like one of two issues. Either a bad capacitor (a very common problem on this model, apparently) or a heat issue. Since it seems to happen every time, even if the machine has been offline for a while, and it takes so little time to do, I'm inclined to throw out the heat issue.
Open up the back and see if you see any capacitors leaking, or crooked. I can't find images for capacitors in your machine, but I did find a site about bad capacitors on PC system boards - the capacitors are basically the same thing, so it might help you identify that.
http://www.badcaps.net/pages.php?vid=5
If you do see bad capacitors, either solder on new ones, or just replace the entire board. It should be simple to replace. I can't find parts for this online, but you should be able to get them either from Sharp or from a local repair shop.
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you. Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
I have had exactly the same problem. Sounds daft but by not using the remote, and only using the power on/off switch on the TV itself, it is working perfectly...no idea why
Use the remore for changing programmes etc but not for on/off
Try it anyway because I know how annoying this is
Unfortunately I can promise you that you CANNOT repair this. Your power and opc lights coming on, but the tv is not coming on. That is a issue within the tv. Give sharp a call and they will have somebody come fix your tv free of charge, if they cant fix it, they will replace it for free. That is the only thing you can do. Sorry bro
After being on a little while, the screen goes black (no audio as well) for 20 to 30 seconds. Green light stays on. Then, picture comes back on and takes a couple of seconds to get up to full brightness. About 5 seconds or so after the video comes back, the audio returns.
Until this morning, has only happened a couple of times a day, now happening more often. About 3 times in last 20 minutes.
Since I posted this problem, I have fixed it myself. Out of frustration, I unpluged it, removed the back panel and blew all the dust out of it using an air compressor for higher pressure.
(tv was used when I got it) So far I have not
had a recurrance in 6 months. It seems that the
accumulated dust was causing an arcing somewhere.
It may not solve the problem for everyone but it
worked for me.
Shortly after I posted this, I decided to investigate the problem, so I unpluged the unit, removed the back and found there was a fair bit of dust inside. I got a dry air supply and blew all the dust off of
the electrical components, avoiding contacting anything with the air nozzle. There was quite a bit
of dust inside that you couldn't readily see. After putting the back panel on, I plugged it back in and
its been running flawlessly since, thats almost 4 years now. It seems the noise was an electrical arc
jumping across a dusty circuit.
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