Question about Protron PLTV-32 Television

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Power Supply I checked the ceramic fuse after the switch assembly and that was fine. The I/O switch itself was tested to be ok also. Everything I'm reading points to the power supply? Is this correct and if so, where can I order one for Protron??

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  • dculican Aug 25, 2008

    I was being honest, thank you for trying...I did not know they were bankrupt.... It isn't helpful to me, because it does not solve my problem..... if you said, they are out of business but you might want to try company xyz, then I would say that is helpful.... once again, thanks for trying


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I had a pwer supply for my Protron 32 inch TV that was not working. I bought the one on ebay and it stopped working after only three weeks. Ultimately I found a guy who could fix my original power supply for a reasonable price. It been working for a year now with no problems. I wish I would have tried him first!!!! If anyone is interested his email is

Posted on Aug 26, 2008

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Proton has declared bankrupcy and is no longer issueing, honoring, or providing service in anyway shape or form. People that have sent in their TV for service will be lucky to get the broken TV back.

The old saying you are SOL seems to apply here.

Posted on Aug 25, 2008

  • Daniel Jenkins
    Daniel Jenkins Aug 25, 2008

    The rating thanks for trying is not accurate. Please rerate this or I will report this as abuse. Protron is out of business and has declared bankrupcy. What more do you want?


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No power is getting to the board at all. it appears to have no fuse, where the fuse should be is a little brown cylinder shaped object T4A 250v it is soldered to the board. is this my problem?

Hi Michael
Your certainly doing all the right things. I wish more people on this site would give a great description like yours.
OK, so Process of Elimination.
An AC Multimeter would prove useful here.
Assuming your fairly technical and are aware of electric shocks.
Use the meter on AC scale to check for 110 or 240v AC inside your TV power supply section.
Does it get to the board? Does it get to the Switch Mode Power Supply?
Switch Mode power Supplies can be powered up by a normal AC type switch (ac wires to physical switch) or a Logic type switch. (Like on a computer Keyboard) This triggers the Switch Mode to turn on. Usually you get a high frequency zip sound.
Is the switch mode supply open on the PCB or is it in a Metal Enclosure? (perhaps has a separate fuse inside) the Electrolytic capacitors inside here are in a harsh environment so this is where they leak or bulge.
If the Switch Mode Supply doesn't come to life then you have the problem.
The other side of the Switch Mode Supply is lower DC voltages. Perhaps 12v or 5v. Use the multimeter to check.
A logic type switch usually stores a voltage in a capacitor on the secondary low voltage side of the Power Sup. When the logic switch discharges the cap it fires up the SM Power Supply. This is how computers boot up. So look for bad cams on low voltage side.
See where wires come in from switch to Power Supply.
Good Luck

Jul 03, 2015 | Hisense Refurbished 50"" 1080p LED-LCD...

1 Answer


hi,the first thing to check with this kind of problem is the power supply section.this requires opening of the back cover.If you are handy with electronics you can check the voltage present at the power board by using a digital multimeter..

here's the procedure,
Use a philip screw driver to unscrew the cover.once the cover is remove,you can immediately see the power supply board .Powe supply board is where the power cord is connected(make sure to unplug the unit before proceeding)
check the fuses,set the tester to resistance or continuity test.test the fuse you must have a reading of 0000 this means that fuse is good OC means fuse is open.replace the fuse with the same type of amperage it is printed on the fuse...
If the fuse are ok,check for the voltage output of the power board.voltage are as follows,
5 volts DC supply for the mainboard
12volts DC for the audio board
24 volts DC for the screen
when all this voltages are present problem could be on tha mainboard itself and needs a replacement.

If one of the voltages fails then you need to repair the power board check and replace all bulging capacitors and open can also replace the whole powerboard It is available online at
good luck and let me know how it goes..

Jun 06, 2012 | Seiki SC221FS 22 Class LCD HDTV

2 Answers

Hitachi LCD TV looks like no power but power cord checks good

Eventhough the fuses and power cord os good, and there is no power light on the panel board, means the power board do not get power to it. Check an other power outlet point first. If it does not help you, soethnig wring with the power regulator baord. Normally, these board are irreparable, and replacement should be done as card basis. OK.

Feb 07, 2012 | Televison & Video

1 Answer

I try to turn the tv on but there is no power.

check the incoming power with a tester and if ok then check the plug fuse and if burnt replace and if ok proceed to open the tv cover and check the cable continuityand check the fuse in the power supply region if blown, check other components inthe power supply area and replace the faulty ones if any then open the fuse in the power supply and connect a 100w test lamp to see if there is a short circuit. if the bulb lights up and gets dim gradually you ca now remove the lamp and put backthe fuse and test again

however, your tv problem could be solved by simply replacing a burnt fuse but its always advisable to verify the cause of the blown fuse

Sep 21, 2011 | Sanyo Televison & Video

1 Answer

Mains supply fuse blows

There is some short circuit with the power switching regulator section. Check the MOV [Metal Oxide Varistor] connected accross the main AC power line, on board. This device will look like a ceramic capacitor, usually green or black in color. If any voltage spike comes over, this device will get shorted, and the fuse will burn off; thus it is used as a protection against overvoltage and current spikes. If it is alright, check the rectifier diodes or stalk rectifer fitted for any reverse short. You can measure the short very easly by measuring the resistance between the two terminals of the main resevoir capacitor. If this point shows any short, check out the revalent components, including the power switchig device, either it is transistor or an STR, whatever may be. Anyway, there is a direct short in your power supply regulation system of your TV. Get it repaired first, before put a new fuse in place. OK.

Aug 14, 2011 | Toshiba 27WL46 27 in. LCD Television

1 Answer

26la30q wont turn on

You have to start checkin from its main ON/OFF switch itself. If the switch have any contact contact trouble, the set will not turn On, even though you hear the click sound from the switch. If switch is Ok, then you have to come to the power supply regulator board. It can be easly recogonized the powe supply regulator boad. The main supply line will go straight to it. There will be more that 5 or mor secondary voltages from it, according to Tv model. These secondary wupplies will energzed only after the power supply switching circuit work properly.
Ther is a fuse [ a cartridge type; replaceable]. Check the fuse first. If it has blown; be carefull when you replace it; because there must be some reason for the blowing of that fuse. It is really a protection device. Before replacing it, you have to check the entire power supply board for some short circuit. If you have sound knoledge in repairing Switched Mode Power Supply [SMPS]; just proceed. Otherwise get it repaired by any experienced service technican or by authorised service center for Proscan. OK.

Jul 08, 2011 | Proscan 26LA30Q 26 in. LCD Television

1 Answer

Virea tv has just stopped working. Whilst watching it has switched itself off and there is no standby light or anything. All power cords and supplies are fine but it won't switch back on.

Good day!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.

I hope this solution will be helpful.Thank you and good luck.

May 29, 2011 | Televison & Video

1 Answer

Need to find the ceramic fuse for my samsung 50"

Hello Dyan, Hi you can find one at any electrical or electronics shop that sells spare parts, But mind you the reason why the fuse blows in the first place, have the power supply board checked for shorts such as a shorted switching regulator. If in the event the replacement fuse blows again, there is definitely a shorted part. Have this checked by a technician.

Feb 12, 2011 | Samsung FPT5084 50 in. Plasma HDTV

1 Answer

Fuse seems to have gone so tv cannot switch on.

If you fuse had gone off then it is most possible that the set has a failure within, This can a short in the powerr supply section or the high voltage section. So first of all remove the back covers and use a multimeter to check on the power supply which could be swittch mode power supply. You must look for short in the surge protector, the filter capacitors, the rectifiers, teh main capacitors or the SM drives. If these are fine discconnect the HT side and switch on to confirm the power supply. If fine check on the HT for failure of the drivers/ capacitors in the section by a contiinuity, voltage test. Do it carefully, get help if not familiar. Good day

Aug 05, 2010 | Televison & Video

1 Answer

Viewsonic n3251w - no power

A lot of TVs are having their power boards go bad due to a poor brand of capacitor (CapXon usually).

If small problems are noticed with the tv, the solution is to replace the capacitors. However, once the TV gets to the point where there is no power at all any more (not even a stand-by light) then the power supply has to be replaced.

Visit Viewsonic's website or call your local Viewsonic repair shop to get a price on this board. They are usually under $100.

Jan 17, 2008 | ViewSonic N2750w 27 in. HD-Ready LCD...

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