Question about Sony FD Trinitron WEGA KV-34HS420 34" TV

1 Answer

I turn it on the on light comes on and then it turns off

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 148 Answers

The caps (capacitors) in the powerboard are going out. This is a very common problem in all class and price ranges of modern lcd and plasma tv's/ monitor's. I don't know if this problem has been like this for awhile or it just started, but either way, if the tv takes an abnormal amount of time to "warm" up then it most likely will go out all the way sometime in the (near) future. If you have a tiny bit of will and knowledge ypou can open the unit and get to the print board. Examine this for "popped" capacitors, they will have a buldging top instead of a flat one. Im gonna try to include a pic of them here, if i can get it this time, I've tried bfore lol. But you can google image a "popped" or "bad" capacitor and you would be able, with ease, to diagnose if you have any of these. Usually only one or two. Radioshack sells capacitors (couple anyway) for $1.59 each. MAKE SURE the replacement is of the SAME voltage or HIGHER, or you will be right back replacing those 2. Every capacitor has a negative pole marked with an (-) on the side of the capacitor(by one of the "legs", always puit the negative (-) "leg" of the new capacitor in the same hole in the printboard as where the previous negative (-) "leg" of the capacitor was ( a capacitor with the negative and positive "legs" put in backwards will result in the new piece "popping" as sson as you turn it on!!) make sure the "uf" rating (for example the most common popped capacitor is the 1000 uf) is the same as the one you are replacing. I needed 1000 uf, 105 c and 26v (volt) ratings for the 1 capacitor I needed to replace to fix my LG 19" lcd panel monitor I found by the trash that the light came on off, but it didn't come on. I replaced that capacitor with ; 1000uf, 85 c and 36 v (volts0...It works fine eventhough the volts and the temperature rating (36v and 85c) was not the same as the (26v(volt) and 105c ) capacitor I removed !! Further, I've replaced capacitors that had the celcius rating of 105 with the only ones Radioshack had, namely 85 c(celsius) they have been working great, but I'm not sure about any effect, nor have I heard or read (yet?) about that making an urgent difference. Many threads that I've read people have done the same, so we should be ok (my stuff has been running good for a while longer then most brand new ones!.............(all these ratings ; 'uf ' and 'c' etc are on the side of the capacitor you are replacing and on the side of the ones you are replacing them with)...For all this all you need is the cheapest solder gun u can find (I bought one for $7.99 at Radioshack), a camera (to take pictures as you go to remember how to reassemble the unit) and, once you have your materials, 20 minutes to replace 2 or 3 capacitors and you are good to go...Most monitors and tvs (lcd/plasma) I've seen you have to lay flat on the ground/bed/blanket etc, to work on (screen side down). Usually there are 2 or 3 screws (or a few more) to remove, then you will have to carefully (its comes off easily most times)insert a flat screwdriver inbetween the casing and gently pry it up as you go around the whole frame. Sometimes you have to remove the little washer arouind the cable input orso, just be gentle and you cant go wrong. Once insidet here will be a box with wires running to the sides etc...unplug, gently, these wires and open the box. Inside you will find 2 or 3 circuitboards, check them all for "popped" capacitors, replace, reassemble and plug it in....Have fun becoming an overnight tv mechanic lol!

If this helped you (or not), then please rate!, thank you.

Posted on Feb 03, 2010

  • roadtrippin Feb 03, 2010

    PS..to you asnd anyone else with this problem (all plasma/lcd, monitors, tvs and projectors)..PLACE A FAN BEHIND THE UNIT, THIS WILL PROLONG THE LIFE , SOMETIMES FOR MONTHS!!..Cooling the overheated components inside will bring therm back to the normal stresses the undergo and this could extend the usefull life of the tv for a while, or till you repair/replace the unit....

    AND , as always, if helpfull (or not ) please rate, thank you!

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Why are al my lights coming on when I mash the brake peddle or use left turn signal


Spray electrical cleaner in where the emergency flasher switch is. Turn it on/off rapidly several times. Spray into the directional switch, too. Dirty contacts there are a common source of trouble. Might need a new multi-function switch if cleaning does not fix it.

Mar 13, 2015 | 1996 GMC Sonoma

1 Answer

1984 Chevy Suburban tail lights not working


Check the tail light bulbs, check to make sure the dash lighting switch is turned up but not turned so far up that the interior lights come on when the door is closed.

Jul 22, 2017 | Chevrolet Suburban Cars & Trucks

1 Answer

Lights come on when car started


they come on because car man. made theme this way day running lights u can turn off by using hy beems or turn light switch to on may shut them out it's a safety issue

Feb 15, 2013 | 2000 Chevrolet Impala

1 Answer

Tv will not turn on, red flashing light comes then turns off


tv will not turn on, red flashing light comes then turns off.
light flashes six times.

Aug 15, 2012 | Sony KP-53HS30 53" Rear Projection...

1 Answer

Magnavox about 7-10 years old as soon as i turn it on it turns off and stays off


my 42 inch sagem tv is overheating, the red light comes on, then 2 lights come on and then turns off, and light stays on. and only turns off when you disconnect tv. When i turn on the tv after 1 min the light flashes, the tv turns off and the light stays on.

Sep 18, 2011 | Proton MM2701VT 27" TV

1 Answer

I have no signals and when brakes lights are on, lose brake light to either side turn signal is set on


Hi!!

If you activate the turn signal switch and you step on the brake pedal, the turn switch (on the steering column) deactivates the brake light to make the signal light more visible. The bulb for the stop and turn lights is the same.

Turn hazard lights ON. If they don't blink, replace turn/hazard flasher, If one or more lights don't come on, replace bulb.

Check fuse and circuit wiring for broken or loose connections. If all looks fine, check following:

If front turn lights work fine, check brake/turn bulbs.

If turn lights come on but don't blink, replace turn signal/hazard flasher.

If front and back turn lights don't come on, replace switch on column.

Let me know how it worked out, Good Luck

Mar 24, 2010 | 1991 Plymouth Acclaim

1 Answer

Battery was going flat .Battery light not coming on when you turn ignition on. Replaced alternator lightcame on when turned irnition on than when out and next time started car battery light would not come...


This sounds more like a voltage regulator problem. The warning light is turned on by this device. When a charge comes from the alternator, it turns the light off, when the charge stops. ie egine stopped, it turns the light on, if the key is still on.

Mar 21, 2010 | 1998 Hyundai Elantra

1 Answer

REAR BRAKE LIGHTS DO NOT COME ONLY TAP LIGHT IS


Check for power at the turn signal switch. White wire comes from brake switch switch into the turn signal switch. The brake light switch is working because the high mount brake light is working..right? Do the turn signals work ok? if so, then the wiring is OK. The brake signal wires that come out of the turn signal switch are dark green(right) and yellow (left).

Oct 27, 2009 | 2001 GMC Safari

1 Answer

Dash light do not come on but lights do for drl on 2005 chev equinox


DRL (Daytime Running Lights) will come on any time you start your car.
The dash lights do not come on, unless your headlights turn on. Either by a daylight sensor or if you manually turn them on by the switch.
So even though your headlights are on with the DRL, if you notice the tail lights do not come on (just like the dash lights don't).

To test if your dash lights do work, turn your headlight switch on. You should the the tail lights and dash lights come on.

Sep 11, 2008 | 2000 Toyota Corolla

Not finding what you are looking for?
Sony FD Trinitron WEGA KV-34HS420 34" TV Logo

272 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Televison & Video Experts

kakima

Level 3 Expert

102366 Answers

The Knight
The Knight

Level 3 Expert

74459 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a Sony Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...