Led TV dark screen problems

This is a brief description of Dixon 32inch led tv with sound but no pictures/images.

✓ TV comes on you hear people talking etc still no picture.switch the tv off and unplug it from wall socket.

✓ put the tv on a flat table with some sponge or something soft to protect the screen from any damage.

✓ now take your Starpoint screwdriver and take out the screws holding the cover.

✓ put the screws in a container and put it on a safe place.

✓ take off the cover and put it one side.

Youll see the main board This is what you should check.

✓ check for swollen or bulged capacitors.

✓ check next to where the screen plugs for any damage.look carefully

If everything is fine move on to step 2.

Remember this is a brief summary.now we go straight to the backlights.

✓ now look at the strips individually and carefully.Here we are looking for blown track.

✓ take your 12 volts(DC) charger and cut it in the middle and seperate the wires one is + the other will be – .take the -(negative) wire it is the one with white small dots and put the 470 ohm resistor there.The colors on the resistor are yellow violet brown then gold.

✓ on the backlight strip theres positive and negative.on the led there’s also marks of + and – just put your negative wire on the negative on the strip and put your positive wire on the positive spot.

*the led should come on when it is working and nothing when it is blown.

You will see and mark the ones that are blown and replace them with new ones or bridge them that is for temporary though.

Amplifier not coming on/switching on.

You plug your amplifier on the socket and switch it on but nothing is coming on! Don’t worry we got you.👍

STEP 1

✓ Unplug your amplifier from the wall socket.

✓ take your amplifier and put it on an empty clean table.

✓ take your Starpoint screwdriver and take out the eight screws on the amplifier (two on top,two on each side of the amplifier and last two at the back of the amplifier).

✓ put all the screws in an empty bottle/container and put it one side on a safe place.

STEP 2

✓ open the cover of the amplifier and put the cover next to the screws container.

✓ now you must look at the inside of your amplifier very carefully.You must look for any physical damage.

✓ if nothing is blown look at the transformer for any damage.

Unplug the three wires (yellow black yellow)coming from the transformer going to the main board.Take your tester/multimeter and put it on ohm reading and measure those wires.

*first put the leads one on first yellow the other one on the last yellow to black you should get a reading of 2.5 ohms both ways.

✓ if no reading at all your transformer is blown.

✓ there’s an on/off switch with four wires.Look at the two from the transformer take one lead hold it together with one wire and take the AC plug and put the other lead on the N or L of the plug.You should get a reading of 00.0 diode/continuity.

✓ now take two leads

More information to be added  shortly.My apologies.

✓ put the new bridge rectifier in its place and the solder neatly.

✓ put back the board on its place and put the screws in.

✓ now take the new transformer in its place put the nut and bolt to keep it steady.

✓ connect two wires from the transformer to the ones that you cut from the switch,make sure they won’t make a short then check that everything is in place and on the right place.

✓ plug the amplifier and switch it on paying outmost importance in anything that can get hot or blow. Check for any smoke.

✓ the amplifier should come on but the sound won’t be there unfortunately.

✓ check the four transistors on the board by the heat sink,check for shorts its either PNP or NPN

*black lead of the tester/multimeter is on the middle leg and red lead it’s on the leften side leg or the first leg as we call it.Then take the same red lead to the tighten side or the third leg of transistor you should get readings not shorts..556 or .465 diode reading.

STEP 5

✓ switch off the amplifier and unplug it.Now write down the number you see on the transistors or on the board next to transistors themselves e.g tip41 c,d718

✓ go your local supplier and buy them or order them online.Take careful measure when desoldering those transistors because you must put new ones back..

✓ now look at the resistors each and everyone of them,I suggest you get someone with experience or visit Google for resistors color reading.

To be continued…

Kettle heating problem

The kettle switches on red light and everything but it doesn’t warm/heat up the water inside.No need to call a professional Technician yet,just follow this simple easy DIY steps to get your kettle working perfectly again.

STEP 1

✓ unplug the kettle from the plug.

✓ pour out water and make sure the kettle is empty.

✓ find a neat space/place to work on e.g table

STEP 2

✓ open your kettle and check the inside (the element) for physical damage.

Symptoms of bad element

* element will have blackish colour ontop.

* element will be cracked on top,you can even see the white powder-like coming out of the element.

STEP 3

✓ close the kettle and turn it on a side(put it flat on a side)

✓ there’s four screws (screws vary depending on kettle model/make)

✓ take your screwdriver and take them out.

✓ some kettles have a clip below the last two screws at the bottom,take small flat screwdriver or a flat sharp object preferably a knife to unclip it.

STEP 4

✓ open the kettle as if you are going to pour water in.You’ll see two screws on top, remove them also.

STEP 5

(only focus on the three wires going straight to the element).

✓ take the three wires out individually putting tape on each one of them just to mark them for safety (it will be easier when putting the new element).

✓ now take your screwdriver and take out the three screws holding the element (apply a little bit of pressure on the element, holding it in place with your other hand).

✓ now finally take the element out by pulling gently and take it out of the kettle straight to the nearby electronic Shop.Take it as a sample.

Well done for now another session is on the way on how to put the element back inside your kettle.

I thank you.

Laugh your troubles away.

Yours in electronics

@greatvince

N

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