Loud popping sound coming from 32" Toshiba

HV77 · 05-21-2008, 04:52 PM

I have a Toshiba 32AF45 32" flat screen CRT that I have had for about 3 years, and ever since I got it it has been making this loud popping sound that seems to get worse as the tv stays on for longer (presumably because it is heating up). It is very annoying and I can't figure out what is causing it. Any ideas?

mwschultz · 05-21-2008, 07:05 PM

Do you get a flash of light on the screen at the same time - high voltage discharge? My Sony 34XBR970 had that problem especially on hot days after warm-up. I had a Sony tech. come out and replace the C R T Board Assy (big circuit board on back of C R T), replace a plug and apply some silicone insulation epoxy on the C R T pins, all under warranty. So far, so good.

HV77 · 05-21-2008, 08:07 PM

No flash, I have been reading about that though from other people's experience. It is just the loud noise, and it is about every 6-10 minutes on average. It is so irritating I barely ever watch tv anymore.

mwschultz · 05-22-2008, 10:12 AM

Have you tried leaving the power unplugged for about an hour?
Unfortunately, I feel you need to have a Toshiba service person come
out and repair the set (or haul it to one of their service centers).
Good luck.

HV77 · 12-08-2008, 06:25 PM

Quote:

Originally Posted by mwschultz

Have you tried leaving the power unplugged for about an hour?
Unfortunately, I feel you need to have a Toshiba service person come
out and repair the set (or haul it to one of their service centers).
Good luck.

Well I had a serviceman come but he didn't do a lot, just said that it was something to do with the small dimensions of the casing. I know it is not right though, and it really drives me crazy.

BobY · 12-11-2008, 11:55 AM

High-voltage arcing will produce a loud "snapping" sound and is often a sign of a power supply component about to fail. Sometimes it can be caused by intermittent connections in the high-voltage section, which can result from oxidation on connector pins. If that's the problem, the TV has to be disassembled and the various high-voltage cables disconnected and the pins cleaned then reconnected.

If you are not experienced in servicing TV's don't even think of trying this! Even with the TV unplugged, there can be significant voltage stored in various circuits which could bite you if you're not careful. It would be really bad to break the neck off the back of the CRT in an involuntary response to a shock.

HV77 · 01-08-2009, 12:13 PM

Quote:

Originally Posted by BobY

High-voltage arcing will produce a loud "snapping" sound and is often a sign of a power supply component about to fail. Sometimes it can be caused by intermittent connections in the high-voltage section, which can result from oxidation on connector pins. If that's the problem, the TV has to be disassembled and the various high-voltage cables disconnected and the pins cleaned then reconnected.

High voltage arcing - is this coming from the wall outlet power source or within the tv? What is the best way to determine if this is my problem? Also, how much would I pay to get the tv taken apart if that were the problem? Thanks

Bigloww · 01-08-2009, 12:59 PM

If it is an "internal issue" I would not bother trying to get it repaired (unless you really love the TV).. The price for the part and labor will probably run around $250 + most likely. That depends on the part, avaliablity, labor rates and how long it takes for them to diagnose the problem correctly.. You can by a 32'' LCD now for starting around $500 or so..Unless you just want the CRT, I would look into that IMO.. Especially since it has been going on for over 3 years now..Since it happened when you got it, you should of had it serviced while under warranty but oh well. Did the service man that came out and "found nothing" charge you anything?

BobY · 01-08-2009, 10:38 PM

Quote:

Originally Posted by HV77

High voltage arcing - is this coming from the wall outlet power source or within the tv? What is the best way to determine if this is my problem? Also, how much would I pay to get the tv taken apart if that were the problem? Thanks

It would be internal to the TV (we're talking 800 Volts or higher). If you've got arcing in your wall outlet, make sure your home-owner's insurance is paid up (one of the most common causes of house fires)...

The best way to determine if this is the problem is to open the set up, clean the connectors and see if the problem goes away.

Unfortunately that's probably going to cost you $100-$300 to have a tech do it. At that point, you might as well replace the power supply to insure the problem gets fixed. Many techs won't even open up a TV for less than a $100, even if they don't fix anything--they usually charge more for an HDTV, but there is really no good reason for that.

We have entered the age where, unless you know how to do it yourself, it simply isn't worth it to repair a CRT-based TV and they will all be shuffling off to the great landfill in the sky. Which is a shame, because CRT's still have way better-looking pictures than most LCD's for less money. But CRT's are limited in screen size, big, bulky, heavy, more complicated to build, adjust, ship and service compared to newer display technologies and nobody wants to manufacture them any more...

Anyhow, unless you know what you are doing, don't even think of opening the TV up. Getting electrocuted or a face-full of imploding glass shards is unpleasant.

sallgoodguy · 01-27-2009, 07:18 AM

My brother inlaw went thru the same thing with his toshiba. The poping turned into a near explosion sound. He had bought an extended warantee and I'm pretty sure they ended up replacing the screen, but I will find out for you what the problem was. I do know that he finally got a tech that had seen this problem before.

05-21-2008, 04:52 PM	#1
HV77 High Definition is the definition of life. Join Date: Oct 2007 Posts: 95	Loud popping sound coming from 32" Toshiba I have a Toshiba 32AF45 32" flat screen CRT that I have had for about 3 years, and ever since I got it it has been making this loud popping sound that seems to get worse as the tv stays on for longer (presumably because it is heating up). It is very annoying and I can't figure out what is causing it. Any ideas?

01-08-2009, 12:59 PM	#8
Bigloww Shitter was full. Join Date: Apr 2006 Location: In a van, down by the river. Posts: 5,135	If it is an "internal issue" I would not bother trying to get it repaired (unless you really love the TV).. The price for the part and labor will probably run around $250 + most likely. That depends on the part, avaliablity, labor rates and how long it takes for them to diagnose the problem correctly.. You can by a 32'' LCD now for starting around $500 or so..Unless you just want the CRT, I would look into that IMO.. Especially since it has been going on for over 3 years now..Since it happened when you got it, you should of had it serviced while under warranty but oh well. Did the service man that came out and "found nothing" charge you anything? __________________ Commit to the Indian.. *In Loving Memory of Junkie, The Rizz, Eagle and the Boys.. They are gone (wasted in fact) but not forgotten..*

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05-21-2008, 07:05 PM	#2
mwschultz How can anyone watch standard def? Join Date: Jul 2006 Posts: 20	Do you get a flash of light on the screen at the same time - high voltage discharge? My Sony 34XBR970 had that problem especially on hot days after warm-up. I had a Sony tech. come out and replace the C R T Board Assy (big circuit board on back of C R T), replace a plug and apply some silicone insulation epoxy on the C R T pins, all under warranty. So far, so good.

05-21-2008, 08:07 PM	#3
HV77 High Definition is the definition of life. Join Date: Oct 2007 Posts: 95	No flash, I have been reading about that though from other people's experience. It is just the loud noise, and it is about every 6-10 minutes on average. It is so irritating I barely ever watch tv anymore.

05-22-2008, 10:12 AM	#4
mwschultz How can anyone watch standard def? Join Date: Jul 2006 Posts: 20	Have you tried leaving the power unplugged for about an hour? Unfortunately, I feel you need to have a Toshiba service person come out and repair the set (or haul it to one of their service centers). Good luck.

12-11-2008, 11:55 AM	#6
BobY What's all this, then?... Join Date: Jan 2006 Posts: 6,197	High-voltage arcing will produce a loud "snapping" sound and is often a sign of a power supply component about to fail. Sometimes it can be caused by intermittent connections in the high-voltage section, which can result from oxidation on connector pins. If that's the problem, the TV has to be disassembled and the various high-voltage cables disconnected and the pins cleaned then reconnected. If you are not experienced in servicing TV's don't even think of trying this! Even with the TV unplugged, there can be significant voltage stored in various circuits which could bite you if you're not careful. It would be really bad to break the neck off the back of the CRT in an involuntary response to a shock.

01-27-2009, 07:18 AM	#10
sallgoodguy A couch and an HDTV to go please. Join Date: Jan 2009 Posts: 10	My brother inlaw went thru the same thing with his toshiba. The poping turned into a near explosion sound. He had bought an extended warantee and I'm pretty sure they ended up replacing the screen, but I will find out for you what the problem was. I do know that he finally got a tech that had seen this problem before.