Having problems with your Flat Panel Televisions ?

Vizio VO370M will not power on. Vizio log stays yellow when power button pushed. Problem occurred following lightning storm, so suspecting the PS, but not certain. No physical damage apparent to either the PS or mainboard (fuse is good, no bulging/leaking caps, no burned spots, etc.). When testing PS, 5v connectors supply good 5.3v. 12v connectors have no power, but not certain if they always supply power or only when switched on. Is this more likely to be the PS or the mainboard? Would r



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Did you ever finish the repair?

Repair Help & Product Troubleshooting for Flat Panel Televisions
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Vizio VO370M will not power on. Vizio log stays yellow when power button pushed. Problem occurred following lightning storm, so suspecting the PS, but not certain. No physical damage apparent to either the PS or mainboard (fuse is good, no bulging/leaking caps, no burned spots, etc.). When testing PS, 5v connectors supply good 5.3v. 12v connectors have no power, but not certain if they always supply power or only when switched on. Is this more likely to be the PS or the mainboard? Would r


Did you ever finish the repair? ... Vizio VO370M LCD TV

I purchased a power supply from a well known distributor online and it is for Polaroid FLM-373b lcd tv. part # MLT070AX- and possible <<DOA>> If it is pluged in and power is @ the board should I have my supply voltages ALL present @ the output feed connectors all I have is standby 5v ?? no 12v no 24v and tv still wont turn on ..fuses all good..


Yes , the SMPS unit will output the 5-Volt which is the feed to the main CPU- the processor. Now trace the +5 to the processor and check the oscillations on the processor. Only if the processor works and outputs to feedback ... Flat Panel Televisions

Samsung HP-T5054 plasma, 40 months old. Apply power, power indicator blinks several times normally then goes very dim but steady on. No picture. Have removed back of TV and inspected. All fuses verified good. No bulging or leaking caps. Have BN44-00160A Rev 1.2 power supply. Have multimeter. What next?


... Samsung PS50P7H 50 in. HD-Ready Plasma TV

I have a Insignia NS-L32Q-10A that will not power on. Now power on light or standby. I have replaced the power supply already. All caps look good and fuses check OK. What next???


Ok, when you plug in the set, does the power light come on? Assuming you ordered a power supply in good working order, you may very well have a faulty main board. The power supply produces standby power that the main board uses to power the standby/p ... Insignia NS-L32Q-10A 32 in. HD-Ready LCD TV

Panasonic tc-p50s2,had lightning strike near house and tv stopped working,no lights,no power,all fuses that i see test good, i replaced power supply and main power board and still same thing?


... Panasonic TCP50S2 50 in. TV

My westinghouse 46" led tv will not turn on, tested the ac power supply and its good


The problem might be of its mother board itself. Contact any experienced service technician to make it confirm before change it. There are so many adjustments should be done after changing a new mother board. It is not a user reparable work. ... Westinghouse Flat Panel Televisions

LG 42LC7D-UK TV NO VIDEO BACK LIGHTS ARE LIT VERY VERY FAINT IMAGE ON SCREEN POWERS UP NORMAL AND SOUND IS OK AFTER FURTHER CHECKING THE 3.4V LINE IS DOWN TO 1.9V WHEN SET IS ON AND I CHECKED ALL CAPS IN POWER SUPPLY NONE VENTED AND ESR IS GOOD


24VDC is feeding the backlight inverter? BL_ON signal is ok? The 3.4vdc is at what board?\012One of these service manual may match your chassis:\012 ... Flat Panel Televisions

TV has sound but no picture for about 20 minutes then the picture pops on and is good. The capacitors are all good looking. I was told it was the control board or the power supply? Is the board that has all the caps on it?


The capacitors all looking good on which board? You need to find out when you do not have picture, are you still geting the backlights on, this is important to narrow down the problem. Please read my guides to understand what it takes for the LCD fla ... Samsung LN26A330J LCD TV

Power will not tour on Samsung T220HD model. I replaced a bulging capacitor on the power supply board and still will not turn on. I also tested the fuse with an ohmmeter and the fuse was good. any ideas what to try next?


... Samsung T220HD 22 in. LCD TV

LG 42LC7D-UK TV NO VIDEO BACK LIGHTS ARE LIT VERY VERY FAINT IMAGE ON SCREEN POWERS UP NORMAL AND SOUND IS OK AFTER FURTHER CHECKING THE 3.4V LINE IS DOWN TO 1.9V WHEN SET IS ON AND I CHECKED ALL CAPS IN POWER SUPPLY NONE VENTED AND ESR IS GOOD


... LG Flat Panel Televisions

Black screen and have sound vx42lhdtv10a(vizio 42 2008)power supply is ok(12v,24v,5v) main board have 4v and all fuses is good . my question is? how can i test my inverter board output voltage?how can


... Vizio Flat Panel Televisions

Help new power supply will not power up.


If you had a surge, it could have damaged more than just the power supply. When you plug in the unit, does the power indicator light up??? your main board could also have damage. The main board sends a signal to wake up the power supply thus turning ... Polaroid FLM-3734B 37 in. LCD HDTV

Phillips plasma model 50PFP5332D/37 screen is locked in at grey/white with a colored pattern running horizontally across the screen. note that the lighter area on the left may be due to a ribbon cable connector as it was not there in the begginning.. no display from menus and no changes in appearance from any button presses. caps replaced on the x-sus board incoming and the power supply board on the y-sus outgoing section but no change


... Flat Panel Televisions

When switched on, the power light flashes on and off on the front of the TV but no picture. We have the back part of the panel off and there are no puffed capacitors. Everything looks good except some goop around some of the capacitors. Is it normal to have goop that looks like its flowing out of the caps? Is it a glue that helps it seat better? I have access to a multi-meter and have the checked the output of some of the connectors. Anything to suggest?


It is not normal to have goo coming from the cap. Usually a cap will pop and you'll have the top or bottom puff out. Sometimes a cap will explode and you'll have a little more of a mess. So if it looks like goo is coming out if it then that is probab ... Samsung PS42B430 42 in. Plasma TV

Have a Proview pa-19jk7. When you turn on the TV, the logo screen appears, then the whole screen goes blank. If I try it in a dark room, I can see the picture with a flashlight, and sound is good. I have taken it apart, and dont see any blown caps. I just dont know if its, the power supply, inverter, backlight. Are there any clues from the logo screen appearing first? Thanks!


In this the the backlighting is done this way - the power source delivers an low DC voltage of around 24 volts to the inverter board , the inverter board ups that to about 500 volts DC and delivers them to the CCLF tubes (basically some thin neon tub ... Proview PA-19JK7 19 in. LCD Television

Tv won't turn on. replaced bad caps and after some testing it turned out that the power supply board wasn't giving the supposed voltages.


This problem is not easily to be solved.Tries to changes all the capacitors components even if u think is good around the bad capacitors surrounding area.After that,if u still have the same problems.This problem could be any high voltage components p ... Insignia NS-LTDVD19-09 LCD TV

DayTek no power,removed KP-165C power supply,How to test this power supply


... Projection Televisions

M228WDP-BZ - Pure white screen. Power supply board checked. Voltages through connector to main circuit board OK. Changed main circuit board without any improvement. Need to know the voltges that should be found at the connectors from the power supply board to the screen?


... LG 42LC7D-UB Television

Hey,trying to determine which is main and which is the sub power supply in my Sanyo It died and was diag with a bad power supply. I want to fix myself,not seeing any bad caps ,but do suspect the power supply is bad.


Main power supply unithttp://www.shopjimmy.com/samsung-lj44-00092f-power-supply.htm \015\012\015\012\015\012Sub power board\015\01 ... Sanyo DP42746 42 in. Plasma Television

I have an Akai PDP5016H television recently it will not power on , I have to push power button several times before it comes on , no picture and no sound , Occasional lly it will stay on with the AKAI logo blue screen and then the screen will change to gray or scramble gray. On the upper right corner it it will say" AIR 8" and at the bottom right corner it will say " fill screen" I looked at the power supply for any bad caps but did not see any visibly. I even check the power supply board f


There's a good chance you have failing electrolytic capacitors either in the power section or the inverter section or both.Any caps in these sections that look bulged at the top, or bulged/leaking at the bottom need to be replaced, and in your ... Samsung Flat Panel Televisions

Have a vizio vx 42l on the bench. amber light only no power up have my standby 5vdc and my 3.3vdc power button is sending a high pulse to the main mod but i dont get pson to the power supply mod suspect main mod defective but not sure . ps all fuse's are good on power supply mod as well as main mod and back light mod.


Power comes on but no picture or sound already replaced power board ... Vizio 42 in. LCD TV

I have Samsung UN46B8000XFXZA LED TV. After power surge it will not come on. Plugging it in causes the blue power up light to come on for one second. The relay on the power supply (BN44-00270A) begins to click. The screen does not come on. All appears dead except for the clicking of the relay on the PS board ever few seconds.rnIf I unplug the connector from the power supply to the Main Unit Board (BN94-02661E) and apply 110v, the screen backlight comes on and there is no relay clicking. (


Yes based on your testing it appears that the power supply is at fault solely and you can opt to attempt a repair or replace it altogether. Unfortunately you will not be certain that the main board does not also need to be replaced until you have rep ... Samsung Flat Panel Televisions

I think I shorted out the power supply board on my Onkyo HT-R667. I was replacing some the capacitors to repair a hdmi switching issue. I was testing the repair with the top cover off. While it was powered on I accidentally touched the metal top to the top of the power supply board CMKM-P3X. There was a spark and the unit turned off. It won't turn back on. No lights. Can it be fixed or can I purchase a replacement board if this is even the issue. Thanks


... Flat Panel Televisions

I have a samsung ln-t4053h that had a bad caps. I replaced the caps and the tv turned on fine and i put a flashlight to the screen and the screen turns on but the backlight is on 10 and it looks like its not on at all so that leads me to believe the backlight inverter. As I was testing this the power board slipped and touched a metal part in the back of the tv, sparked, and now the tv wont turn on at all. I figure that i shorted out the power board. If I replace the power board will me tv turn o


... Samsung LN-T4053H 40 in. LCD Television

I have a Sharp LS-26SB24U that has a white screen when turned on. I tested main fuse and F404 fuse both were good. I tested power going from F404 to ground and it was 13v on both sides. I guess my next step is to see if the T-con board is getting power but I'm not sure how. I tried following a white line that said power and along is was a hole and I went from there to ground but got nothing. Any help would be greatly appreciated.


... Sharp LC26SB24U 26 in. LCD TV/DVD Combo

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