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I have a 42" Proscan tv when i power the tv on it starts to make a buzzing noise, the noise is not affected when volume is changed and it says on for approx. 2 secs after tv is shut off
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Oct 16, 2012 - My Proscan 42 tv is turning on and off by itself, changing channels on it's ... that is next to the power connection plug is discolored at the board.
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https://www.youtube.com/watch?v=TC908vQ8jaw
Jan 17, 2013 - Uploaded by ShopJimmy.com
RCA TV Repair for Blank Screen TV Will Not Power On How to fix... I have a Proscan PLDED3273A-E. Looks like my problem is the L1 (brown spot on board) - any suggestions? ... before it turns off the audio still works and the image still comes out if I ...Recently I tried turning it on and I get no standby light.
Hi
If picture and sound is Ok, and only this buzzing sound is heard from the back of the TV, It should be due to core soose of some ferrite cored transformers inside, especially to the power supply regulator board of the TV. Open the back cover of the TV and swtich it ON. Listeen very carefully which transfromer makes the buzzing noise. Just trouch and press the core of the transformer suspected with some non-cunductive material like glass rod, or a stick of dry wood. You can identify the transformer that makes noise by this way. After identifying the exact transformer; switch OFF the set, unplug it from mains socket, apply some "Super Glue" like fast boanding glue to the joint of core of that transformer. Allow sometime for the glue to set. This will solve the buzzing sound problem of your TV. OK
there is a bad ground.
the hum you are hearing is ac getting into the audio.check all the rca plugs on the set are plugged in all the way.do not run them close to a power bar either.
sometimes a second unit with it's own volume is hooked up to the tv and then the tv volume is up too high because the other box is turned down.if there is a unit hooked up,turn it's volume up ,and the volume on the tv down,otherwise the tv will amplify the residual noise.cheers,ed
I found this solution on another review, hope it works Model Number:Proscan 26" LCD HDTV w/ Built-in DVD Player26LB30QD "pro: good price, TV picture is clear and DVD player is compatible well. con: sound noise There was hum when I first turned the TV on, then I followed these instructions (found it from other review) to fix the hum issue: 1. Turn tv on 2. Input mode should be tv 3. Turn volume to zero 4. With remote enter 9 8 7 6 5. A menu will appear on left side 6. Arrow down to backlight and with right arrow key move number from 81 to 83, press menu button twice, 7. Turn up volume and listen if hum is gone." It works,no hum."
YES! I had this problem and there are others here under humming.
Standing in front of the TV, make your volume zero.
Punch in --very quickly-- 9876
If it worked, it will open a new menu. Go down to the Backlight and enter. Move it up to 83 from 81.
Hit menu twice.
Now try it and see if your hum is gone! [I think I was starting to go deaf trying to hear the volume over the buzz!]
I will warn you to try it a few times. At one point it shut off on me in the middle and if this happens to you, expect the volume to be BLARING when you turn it on again. :-)
The noise from the TV is called 60 cycle hum and it is caused by a capacitor that is open, a test for ripple voltage will confirm this The noise from the VCR is more then likely common mode noise which would not be heard but for the bad capacitors in the TV. Simply put the common mode noise is being added to the 60 cycle hum. Now for how to fix this, if you have a background in electronics you can use a schematic, multimeter and an oscilloscope and Multimeter to find the bad capacitors, and the schematic to tell you what the voltages and %ripple should be. If you do not have a background in electronics, take the set to be repaired
You need to change the Audio / Control Head, as well as the Pinch Roller of the machine. A worn out Audio cum Control Head will reflect in poor tracking and so will cause the above problems.
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