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I have a trutech plv3119951, had a power surge and tv does'nt work now, can I buy a new control board? I checked voltage to the board and thats ok

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I watch the tv but no screen what should i do

Posted on Sep 15, 2010

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1 Answer

I have a 50" Samsung LED tv, that quit working after a recent power surge. Ironically the tv was plugged into a surge protector. Any way after the surge the tv will no longer power on normally, and I have...


To find out what is going on your going to need to measure the power supply voltages and PSON voltage, start with the 5 volt supply if that is normal then test the PSON voltage it should either be 3 to 5 volt and go to about 1 volt or be close to 1 volt and go to 3 to 5 when you push the power button, if you see that change then test the other voltages. if they are all ok the power board is working ok, Be very careful around the power supply, if your not familiar with testing high DC voltage then take it in and have it repaired as the hot side voltage gets close to 400 volts on some sets.

Oct 26, 2017 | Samsung Televison & Video

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Trying to repair a samsung led tv. It was struck by lightening. There are 4 boards in the tv. Do you think if I replace all 4 boards it would work? Could the lightening have damaged the led screen?


any answer here will be pure guessing. and the cost versus the risk of not working by replacing all four boards may make it worth buying a new tv instead.

if you were to try and fix it i would not do anything more than trying to fix or replace the power supply board. . if the power surge has gone further in the electronics. its rarely worth trying to fix

Nov 14, 2016 | Samsung Televison & Video

3 Answers

Stopped working after a storm


Did you have a power surge after a loss of power? If so your TV is ruined from the surge. In the future use a surge protector if don't already.

Aug 20, 2016 | Televison & Video

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I HAVE A 50 HITACHI TV THAT WAS GIVEN TO ME WITH NO POWER PLUG OR REMOTE ,I BOUGHT A POWER PLUG ,PLUGGED IT IN ,YET NOTHING HAPPEN. DO I NEED THE REMOTE TO OPERATE THE ON AND OFF POWER OF THIS TV?


Hello,
The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.
The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.
All these can be checked on the power supply board.
But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.
The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)
You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.
What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).
You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress.
Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.
If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.
I hope this helps.
Regards.

Jul 11, 2011 | Hitachi P50H401 50 in. Plasma HDTV

1 Answer

I have an Hitachi 32 in Plasma tv 32PD5200E which suffered a power surge from a storm sunday night , everything else in house ok replaced fuse but new one blew imediately . Is this set worth repairing as...


The tv have fries alot more components on the tv power supply board,than just the fuse.U have to have alots more equipments and very good eclectronic testing and troubleshooting skills to find out what exact components parts are burn and to replaced it on the tv power supply board.U could take a gamble chance and try website like Ebay.com to buy a whole new refurbish power supply board for the replacement.Might get the tv to be working again might not because power surges,if it have a big enough electrical static charges it will fries alots more boards and it components some where else too.Tv worth repairing or not it is up to u for to do the researching for the new tv prices and the prices charges by tv repair shops by those tv Techs. for repairing the tv..

May 10, 2011 | Hitachi Televison & Video

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After power surge my tv (toshiba 52') will not power on


after a power surge if you dont have in on a surge protector it probably fried the main board in the tv so it wont work anymore..woudl probably be cheaper to buy a new tv than to try to repair the one you have now

Dec 15, 2008 | Toshiba 57H93 57" Rear Projection HDTV

2 Answers

Power board


Open the back of the TV,and look at the can shaped items on the boards.If any of them have the tops,or bottoms bulged out,they need to be replaced.This should get it working again.I hope this helps.If you have any questions,please let me know.Thank You very much!


Tyler

Aug 12, 2008 | TruTech PLV16190 Television

1 Answer

Screen goes black with sound


the lcd control board is out side the control box, its probably the culprit, its under 20 dollars new. the swollen cap means that its getting too much voltage to that component. better do voltage checks on the power supply each transformer is labelled for voltage output make sure its providing the correct voltage and not surging, this can cause the tv to fail with serious problems. now mr zuzu13 you need to have the tv on a surge protector and be careful not to let it arc when plugging in. you also need to do the same checks as above its most likely a power supply problem causing the shut downs. also reset your tv to factory settings by punching in 8282 on the remote this might also solve your problems. but dont forget to check the power supply now it might save you a costly repair.

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