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Tv does not come on is connected to power supply

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Fault with the main power supply regulator 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. Surf the site with patience. Pull up older posts.
http://electronicshelponline.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.

Posted on Nov 17, 2014

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1 Answer

My EMERSON 50 TV WON'T TURN ON


HI,
first of all connect the tv to another power outlet in you home. If then also its showing the same problem Probably the power supply broad would be faulty. you have to check the power supply. if you are able to do it then this video will help you know hoe to check the power supply.

www.electro-medical.blogspot.com
Testing LCD TV Power Supply BoardsSTEP BY STEP

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Tv won't turn on power indicator light not lit


Hi,
As you mentioned the tv have problem with the power supply stage. Before suspecting for any intenal fault Chcek the following first. Remove the AC plug of the tv and connect the same in any other wall outlet. If then also it shows the same problem then its the powersupply board of your tv.
working on power supply board should be done by a skilled worker. Because there is risk of electric shock even if the power is disconnected. some of the capacitors will hold charge even if the power is not connected.

Here i have adde the link which will lead you the powesupply board.

Power supply board

Ajin

Apr 01, 2012 | Magnavox 32MF338B 32 in. LCD HDTV

1 Answer

When i turn tv on the power button shows its on but no pic or sound


the power supply of your TV must be check.the power output of the power supply suppose to be 12 volts for audio,24 volts for the backlight lamp and 5volts for the main CPU. use a multimeter to measure the voltage In the case of your TV it seems only 5 volts is present that is why you have a power indicator lit....open the back cover of your TV and measure the power supply.power supply board is where the power cord is connected...

Apr 19, 2011 | Sansui HDLCD3200 TV

1 Answer

No power on tv, no lights


hi,
there may complaint with ur tvs power supply. first of all check the voltage at the power outlet to which ur tv is connected. if it is ok check the power chord. if all these are proper then problem is inside ur tv. may its power supply fuse may burned. do not attempt to replace the fuse, because there maybe some thing is faulty at the other side, that why the fuse burned. u can find out the complaint if u have a through knowledge in electronics. if not do not attempt to do any thing. consult some qualified person.if u have knoweldge in electonics then remove the power supply board and check mosfets in the power supply board. if find some faulty components then replace it. u can switch on the power supply without connecting to the tv. be very carefull,there are high voltage points. cnonnect a 60w bulb intred in place of fuse . connect the two leads of the bulb to the two end of the fuse connector. and connect the power. if there is any problem the bulb will glose until u switch off, if not the bulb will glows once and go off after a fue second [check the standby poer supply voltage (5v)]. if so remove the bulb and insert a fuse (note the rating of fuse, use same rating). connect power supply board to ur tv. then plug it on.

Dec 15, 2010 | Vizio Gallevia GV42LF 42 in. LCD...

1 Answer

I have a LG 37lc2d and it suddenly turn off and wont come back on, the stand by lights doesnt turn on either. i was wondering if its just the power supply? or how can i troubleshoot this my self to see...


There is a fuse on the power supply close to where the A/C is connected to the board. If the fuse is blown, look at the board and see if there are any burned components and or swollen capacitors. If there are bad components, I would suggest getting a new board.
If the board looks OK, disconnect the connectors from the board but leave in the A/C connector (this way you can isolate the power supply board), replace the fuse, and power up the TV.
If the fuse pops after the power is applied to the unit, then the power supply is bad.
If the fuse is still good, then power off the TV, connect on the main board’s connections, and power up the TV.
If the fuse is still good, then power off the TV, connect the inverters, and power up the TV.
If the fuse blows now, then the inverters and or the panel are bad.
A working power supply will create 5vdc for the main board’s stand by source voltage. This can be found on the power supply at the main board’s connector and it is labeled in black text.
I hope this information helps you.
Good Luck.

May 28, 2010 | LG 37LC2D Television

2 Answers

No power to my Protron PLTV 3250. What can I do


My Protron PLTV - 3250 just went out yesterday. By this I mean it turned on and went out in a few minutes. I left it off and today it completely died. I opened it up because I always think I can repair things. So what I found is a burn mark on the curcuit board of the power supply which is located inside the tv. On the other side of the burn mark is a (zener diode), this diode is burned out and therefore the power supply is not working. I am going to Radio Shack tomorrow Monday Aug. 31, 2009. The diode is very tiny but should be easy to replace with a sauder gun because this diode has place holders to hold the tiny diode in. If this does not work at the top of this page is a link that says power supplies for your tv for sale. I am going to check it out. Anyway just so you all who know about computers= the tv power supply is similar to the power supply on a computer. Just like a computer power supply comes in a case that you install into your computer and then you just connect the connectors to your motherboard and drives. Well in the tv the power supply is stand alone also, you can disconnect the wire connections in the tv and replace the power supply. If you notice the power cable to your tv is the same as a computer power cable, so the power supply in the tv is much the same as a computer power supply. I hope this helps you.

Mar 05, 2009 | Protron PLTV3250 32 in. LCD Television

1 Answer

Power Supply problem? Olevia 265T FHD 65" LCD


Wow, you have a big TV.
Sadly, there are no aftermarket power supplies for TVs like the PC.
Everything inside the TV is no different than how a PC is put together. No soldered connections.
The problem with your TV sounds like it maybe the power supply. But it most likely the power inverter board that powers up your LCD screen. It maybe all in one board or two separate boards. It's hard to tell what the real problem is without a service manual to test the boards.

Feb 19, 2009 | Televison & Video

1 Answer

Looking for SK-26H520S Power Supply Unit


I had a similar problem where the TV would turn on then shutoff when bumped or over time. The clue was a "tick" sound when it shutoff. Unplugging and reconnecting the power cord go it going again for a few minutes anyway.

I took the unit apart and found the solder connection on the power supply unit was cracked where the main transformer attaches. The solder connection joins the PC board. I suspect the weight causes the joint to stress crack. This is easy to fix by removing the power supply and touching up the solder connections around the transformer. I'd check this first as it is very difficult to locate power supplies and other parts.

Nov 19, 2008 | Westinghouse LTV-27w7 7 in. LCD HDTV

1 Answer

TV won't turn on


remove all the external connections connected to the tv.then un plug the tv wire from the power outlet.then after some time just plug only the tv wire back in the power outlet.do not connect the other devices and check if the tv is working as normal or not.if it does not works then

its the problem in the power supply board of your tv.
check for the fuse on the power supply board.
for any blown capacitors or ics.on the powersupply board.
also check for any loose soldering joints on the power supply board.
calling a tech is much advisable.if do not have proper technical knowledge.

it will not be too costly to get it repaired.
it is worth getting it repaired.as this is a common fault faced by many customers.

Oct 13, 2008 | Sony Televison & Video

1 Answer

Tv not working


remove all the external connections connected to the tv.then un plug the tv wire from the power outlet.then after some time just plug only the tv wire back in the power outlet.do not connect the other devices and check if the tv is working as normal or not.if it does not works then

its the problem in the power supply board of your tv.
check for the fuse on the power supply board.
for any blown capacitors or ics.on the powersupply board.
also check for any loose soldering joints on the power supply board.
calling a tech is much advisable.if do not have proper technical knowledge.

it will not be too costly to get it repaired.
it is worth getting it repaired.as this is a common fault faced by many customers.

thanks.

Sep 04, 2008 | Sony FD Trinitron WEGA KV-24FS120 24" TV

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