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Re: very poor sound quality
After installing parts on a board some tv's require that you reset some values on the tv's servicing software. This software is only available to certified techs but you can search the net to try and find it. the caps that were replaced should be of exact value in 3 criteria:
1 Voltage 2 micro farads 3 temperature
Also a note of safety:
There are HIGH VOLTAGE circuits inside your tv that could inflict serious harm even when its unplugged if approached wrong. There should be warning stickers all over the chassis of the tv informing you of the danger that your exposed too. When you take out the primary power supply discharge all high voltage capacitors to cancel the harmful charge they are holding. Especially if you just turned the tv off.
Discharging HIGH VOLTAGE capacitors: use a high wattage resistor of about
5 to 50 ohms/V of the working voltage of the capacitor. If you don't discharge the capacitors or replace caps with inaccurate values you could easily damage other sensitive circuits.
Try resetting the tv back to manufacturers specs and see if this produces better audio quality. And when ever your working on any circuit board be sure that you are well grounded. This will prevent ESD (electro static discharge) which can harm other circuits especially logic circuits. This will cause an imbalance in circuit operation and result in a non working tv eventually.
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That problem is usually cause of faulty capacitors on the power supply board..
Just follow this instruction to fix your TV..
1. Open the back cover of your TV. 2. Look at the power supply board..Its normally connected to the power cord.. 3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors.. 4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value.. 5. Some of the capacitors not bulged so its better if have a capacitance meter
Tv now turn on have a flashes of picture a few sec. than dies have sound left only?Yes,take the tv aparts and check the tv power supply board,that the board where the power a/c cord plug into it.Check the power supply board carefully for dying and soon dead capacitors parts,these dying and soon dead capacitors parts are alway bulging up or puffing up on to it tops.Yes,than these capacitors parts must be replace,will solved this problems.If the tv power supply board it is good and have no dying and soon dead capacitors parts are bulging or puffing up on to it tops.Than the tv have those 2 long LCD inverter boards one on the right and one on the left are dead.These 2 long LCD inverter boards only job are to provide a backlight for the tv LCD screen panel to produce a picture.Must be replaced for the tv have a backlight for LCD screen panel to have a picture.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement or those 2 long LCD inverter boards for the replacement..
Now tv turn on,pictures it flashes only a couple sec. than died have sound left only?Yes,than the tv power supply board,that the board where the tv power a/c cord plug into it.Board it might have dying and dead components parts that are called capacitors.Take the tv aparts.Inspect and check the tv power supply board carefully for dying and soon to be dead capacitors parts,these capacitors parts are alway bulges up or puffing up onto it tops.U have all the tools and know basic electronic also can do basic soldering work too?Yes,replaced all these dying capacitors parts are bulges or puffing up on to it tops capacitors parts with the same Micro Ferit and those capacitors voltages like 5 or 10 voltages higher the old capacitors components parts u replacing,now will solved this problems,also capacitors will last longer and have more heat resistance than before.If the tv power supply board check out and have none dying capacitors components parts that are dying and soon to be dead are bulging or puffing up on to it tops.Than the tv have those 2 long boards each of it sides that are called LCD inverter boards are dead,these 2 long LCD inverter boards only job are to provided the tv LCD screen panel a backlight to produced pictures.If u can't repair the power supply board by ur self,if the tv power supply require it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refrubish power supply board or those 2 long LCD inverter boards for the replacement.
Tv first turn on the tv have a flashes of a picture a few sec,than died have audio left only?Yes,take ur tv aparts and carefully check ur tv power supply board that board where the tv power a/c cord plug into it.Carefully check the tv power supply board for dying capacitors components parts.If have dying capacitors components it usally have bulges or puffing up on to it tops.Tv could have 1 or 2 long boards that are call the LCD inverters board are dead too.If the tv power supply board it is good and have no dying capacitors parts are bulging up or puffing ups on to it tops.The tv 100% have those 1 or 2 long LCD inverter boards are dead.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish tv power supply board or those 1 or 2 long LCD inverter backlight boards for the replacement.
Plasma and LCD TV sets are prone to having capacitors in the power supply section fail. This is the most likely cause for the probem you describe. When capacitors fail your will commonly see one or more of the following symptoms.
Tv now have it on green LED power on for good and tv flashes of pictures only for few min,than dies and have sound left only?Yes,take the tv aparts.U have all the tools and understanding basic electronic also can do basic soldering work too?Check the tv power supply board,that the board where the power a/c cord plug into it.Check the tv power supply board carefully for dead and dying components parts call capacitors.These dying and dead capacitors parts most likely all of the times,will bulges up or puffing up onto it tops.Changes all these dying and dead capacitors parts components,will solved this problems 70% of the times.If the tv power supply board it is good and no dying or dead capacitors component at all.Than the tv a long board that call the LCD inverter board it is dead.This LCD inverter long board are to helping the LCD screen panel to have a backlight to produced a picture.The tv long LCD inverter board have no parts for sale indivitually,al way have to buy a refurbish whole long LCD inverter board for the replacement.Also if you have no tools and soldering skills to fixed the power supply board by replacing capacitors component parts indivitually too.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board or a long LCD inverter board for the replacement.
Tv have problems with it power supply board,that the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish power supply board for the replacement.Or u have all the tools also can do basic soldering and u know basic electronic too?Yes,check the whole power supply board carefully for dying and dead capacitors parts.These capacitors parts alway bulges up or puffing up onto it tops.Replaced all these dead bad capacitors components parts,should get the tv power back to the tv unit again for good.
jtoddweaver, Check out some YOUTUBE videos of lcd monitor disassembly and lcd monitor repair so you will know what you are looking for that is bad on your unit's "switch-mode-power-supply" printed circuit board. If you do the repair to the board, please document your "tear-down" with video or digital still pictures so you can complain to OLEVIA about poor quality capacitors they installed on power supply and also aid in the reassembly process. Do some reading in the fixya profiles of "budmrtn" "buddymc" "12fixlouie" and follow links you find there. Bye for now 12fixlouie
Ur tv the power supply board,that the board,the a/c power cord that go into it.That the power supply board.That board have these parts call capacitors,the board they have these dead capacitors,it have leakage gases.These capacitors,they're bulges up on it top or puff up on it top.You know basic electronic's and soldering?Replaced these dead gases leakage capacitors,that are bulges up on top or puff up on it top.The power supply board will get back to nornal and come on quickly.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
Examine the electrolytic capacitors on the power supply circuit board. If they have vented, then replace them with premium quality units such as Panasonic/Matsushita from Digikey. Should restore your power supply immediately and eliminate this problem for many many years. Estimated life 5-10 years. About $10.00 in parts.
Best to replace ALL electrolytics on the power supply to ensure a long life TV.