Power supply capacitors check out ok but tv still won't turn on

good day if the tv won't power up then just only a blinking light from the indicator, you will need to check the power supply first. you can apply the visual checking usually bulging capacitors at the secondary filter capacitor of the power supply they are leak which need replacement. sample of bulged capacitor en.wikipedia.org/wiki/Capacitor_plague . you can find replacement at www.digikey.com. now after you replaced defective capacitors turn on the tv unit then check all the out put voltage if normal the 5v stand by. 5v switched, 12v, and 24v for inverter ballast now if those voltage are stable i'm pretty sure your tv unit will working fine.

HERE'S THE ANSWER TO YOUR PROBLEM:

The main reason why your TV won't turn on is because of its power supply board. This power supply board are composed of capacitors that are the responsible for the proper supply of current to your TV. If one or many of these capacitors are already burned out or "dead" your TV won't turn on at all. Here's what you've got to do:

1. Open your TV or let somebody do it, much better a technician.
2. Check the Power Supply Board.
3. Check the capacitors. Remove the "dead" ones and replaced it with "new" ones. You can buy capacitors to the nearest hardware in your town, or to your service provider.

I would suggest you to do it with a presence of a TV technician, so that you will be guided properly. Thanks for your question. I hope it helps....

Hello
Check and replace the main filter capacitor in the power supply section. Replace all of them in the secondary section of the power supply too. The problem is due to insufficant smoothing and regulatio fo the power supply section. If main smoothing capacitor gets value deveoped, it won't supply enough voltage to the switching section, and switching section also will go inefficient. Replace all of them. It won't cost not much. OK.

Hello,

The power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.


Hope this will help in solving the problem, do take in handling the fault, because it contains high voltage..
Good luck

Hi,

That problem is 2 causes,its either power supply or system board.
This are some D.I.Y procedure for troubleshooting.

1. Open the back cover by removing all screws at the back.
2. Try to look at the power supply board and find the leak/bulge on top capacitors.If you found,replace it with the same type and ratings.
3. If the power supply doesn't have any leak capacitors.Try to power it ON to perform voltage checking.
4. Check the output voltage of power supply such as 5vdc,12vdc and 24vdc by using voltmeter.If this 3 supplies having a voltage drop or flickering voltage while on power ON.Check the following parts on the power supply,change value/open resistor,shorted transistor and diode or repeat step # 2.
5. When the output voltage is stable and all parts looks OK.The problem could be on system board.Unfortunately the system board or main board is not for D.I.Y because the parts inside is very logic and very sensitive.That is replaceable.

Thank you and good luck.

Good day!

When the TV is not turning ON it doesn't mean that there's a busted fuse inside although it have a possibility.There are a lot of causes to be considered.Like shorted transistors,leak capacitors open resistors and shorted diode.

Follow this D.I.Y procedures to find the exact problem of your TV.

1. Remove the back cover of your TV.
2. After that,find the power supply board.
3. If you already found the power supply,plug-in your TV and power it ON.Check the input voltage of it,using multimeter (AC range).If the power supply have no input voltage the problem could be the power cord.Replace it.
4. If the power supply have the input voltage,try to test the output voltage if have 5vdc for the system and logic supply,12vdc for the sounds and 24vdc for the back-light inverter.Use your multimeter tester (DC range) to test that.
5. If the power supply have a voltage outputs such as 5vdc,12vdc and 24vdc and the problem is still there.The problem could be the main board.Replace it with the same type and model # because the main board is no very difficult to fix and its very sensitive.
6. If the power supply have no output voltage or the voltage is too low,just ignore the step # 5 because the problem is not on the main board,its on the power supply board.

Check the following to fix the power supply board:

• Fuse: Check the fuse if it is busted or blown.
• Power transistor (regulator): Check the regulator if it is shorted or leak.
• Resistor: Check the resistors specially the one that have a low resistance that near the power regulator.
• Capacitor: Also check the capacitors if it is leak or bulging top.

NOTE: If you found any defective parts or components that mention above replace it with the same value,type and ratings.

Thank you and good luck.Please don't forget to vote and rate my answer.

Hey
Whenever there is a TV or any electronics problem ...immideatly remove the plug from the adaptor...some times the problems may go worse.....
Number on problem of all electronic
will be in SMPS circute....
first check for the fuse....inside the smps if blown replace it and restart....
but be careful and be alert....check within 1min
if ok .....proceed......if not remove the plug.....
and consult the electrnics guy

Olevia has problems with the power supplies. Best solution is to remove the back of the TV. On the 542 it is about twenty number 1 phillips head screws. locate the power supply connectors check the board for the voltages, clearly marked on the PCB. Continue to check the voltages by powering on the Television. all voltages should be within its described range. If a voltage is low or nonexistent, the power supply is bad, usually a bad capacitor.
There are three series of caps, on the low voltage side it is 16 volt, next 24 volt and finally 36 volt (these are just max ratings.
which ever power that was found low the cap would be near that voltage output connector.
next step is to remove the board and replace the capacitor, using a soldering iron and making sure to solder with no slop.
with the board on an insulated (nonconductive surface connect the board to the televion. Check voltages and if no other voltage issues reassemble.

You are not the only one I can tell you that. I had a similar problem with my Phillips 42 in. LCD HD TV.

Here's the problem. The Power Supply Board. I opened my TV up(warranty was up of course) and found several bad capacitors. Phillips and several other companies were sold capacitors that although were highly rated failed within 5 years because of a lack of preservatives. All sorts of electronic equipment is now being effected due to these defective capacitors.
Solutions?
1. Take it in and have it fixed
2. Open it up, check the board for faulty capacitors(bulged or leaking) Buy a new Power supply board and install it.
3. Remove PSB, remove faulty capacitors and replace with compatible new ones.

Hope this helps

Check the power supply circuit. Typical voltage at B+ is 105V. Chances are that it is much lower. Check (as you say), capacitors on the primary circuit of the SMPS. Better still, replace all low voltage capacitors within the power supply.