I bought this tv after viewing my friends new purchase he and his wifes is very quite..i bought one and when i powered it up i have an anoying humm noise from the interior of the set..disruptes the audio sound quality..any fix for this or what is the problem
I have the same problem. I have been fighting with Toshiba Canada since March to repair it, replace it or refund my money. In June, they acknowledged that is an issue but will not do anything about it.
Here is the post http://web1.toshiba.ca/support//ceg/techsupport/tsbs/viewtsb.asp?docid=TSB000078
I am sending them a letter asking for something to be done and failing that I will be taking legal action against them.
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Re: toshiba 37av502u hum noise
It sounds like you have a quiet cooling fan problem. Those particular types of tvs are notorious for that kind of a problem after a couple of years. You can take the back cover off and remove the fan. Pretty straightforward and go to an electronics supply house and ge a matching one. That is your best bet of fixing the problem for yourself. God bless you.
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Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. http://electro-medical.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
As goofy as this might seem, a large accumulation of dust inside the TV chassis could be the culprit. The dust becomes conductive and drains the charge from the capacitor that keeps the memory "alive" while the set is powered off. I'm a 40+ year veteran TV technician, but I've specialized almost exclusively in antique (1940's to 1970's) all vacuum tube sets for the past 15 years. I can get a dead 1946 RCA 630TS 10" B/W TV (worth about $2,500 as an antique) working again with about 10 hours of bench time. My new roommate, a lady I've known since we were kids, brought a Toshiba 37AV502U with the same "loses its memory" symptom when she started renting my spare bedroom recently. I opened it up looking for a bulging electrolytic capacitor or a dead RTC battery like some computer motherboards. I didn't find any suspicious capacitors and the only batteries this set uses are the AAA cells in the remote. What I did find was A LOT of dust inside the set. Cleaned the dust out, put it back together, and the set is holding its memory now when powered off. Obviously, the dust was creating a shunt path that was bleeding the charge away from the capacitor that stores charge for the memory.
Ur power supply board.Transformers have have high voltage gap.This problems must take the tv aparts put some glue arond the transformers,sometime solved this problems,or must replaced all the trnsformers make the humming noise.Brand new tv take it back,where u bought it get a replacement or call the Manufacture help to fix the problems or replaced the part that cause the problem.
Thank you for the info. I would suggest to take it back from where you bought it from if the store will allow a 90 days return and replace it for a new one, or you can contact Toshiba to get it fixed under warranty. There should not be any humming noise on the speakers.