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Dead Technika TV Help

jonesytheblade Avatar
6y, 10m agoPosted 6 years, 10 months ago
Snowed in and guess what, the TV's died. smashing. Was working fine til about 2AM this morning and showed no signs of any problem and this morning just wont turn on.

Had it since December 2007 and still have the receipt and it is Tesco's own brand.

Changed the fuse and it still wont switch on

Any ideas? Rep waiting
jonesytheblade Avatar
6y, 10m agoPosted 6 years, 10 months ago
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(24) Jump to unreadLocked
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#1
Have you tried the fuse on the TV plug? The trouble is (if its the same as mine) there not a lot to check. Take the back off and see if there is any in line fuses blown. Turn power off (take plug out) for 15 mins. Check the remote batteries. Last thing is phone Tesco and see if they will do anything / buy another from them and take old back shhhh
banned#2
you actually need to check the fuse cos `i dont think the fuse has gone` may actually be wrong. : )
#3
Edited title for date and receipt


tangramman
you actually need to check the fuse cos `i dont think the fuse has gone` may actually be wrong. : )


I thought it was a newbie statement when i wrote it, gonna try that :oops:
banned#4
google `faulty goods` the sale of goods act should be on your side re - replacement / repair : )
#5
Only have 3A fuses in the house, the one inside it is 5A yet on the plug it says 13A :?

surely if ive had it just over 2 years theres nothing they can do if its gone faulty i thought it was just a year for electrical warrantys? Although id be happy to exchange it in Tesco, theyve had some good tv offers lately
#6
jonesytheblade
Only have 3A fuses in the house, the one inside it is 5A yet on the plug it says 13A :?



Swap it with a 5a out of another appliance:thumbsup:
#7
jonesytheblade
Only have 3A fuses in the house, the one inside it is 5A yet on the plug it says 13A :?

surely if ive had it just over 2 years theres nothing they can do if its gone faulty i thought it was just a year for electrical warrantys? Although id be happy to exchange it in Tesco, theyve had some good tv offers lately


Not necessarily there are European and UK laws consumer laws to protect you. Under EU laws 2yrs is the minimum warranty period, under UK law there is prevision for a 'reasonable life expectancy'. One could argue you'd expect a TV to last longer than that, although tbh I wouldn't expect a cheap Technika TV to last as long as it has...
#8
The change of fuse has done nothing its still dead, seems strange that it was working so well yesterday

now the problem i have is the only receipt i can find is for a 19inch TV bout in Dec 07. this had an immediate fault and was swapped in Jan 08 for the 21" TV i have now. Although i have no receipt for the swap. should i go along the lines of being honest and explaining what happened, or do i try and use the receipt for this TV
#9
Just thought id give an update incase anyone has any problems similar to mine.

After 5-6 weeks including many phone calls and store visits and Tesco continually misinterperating the sale of goods act they have finally given in and sent through the post a store credit voucher to just under half the original value of the product. Not overly excited with this but happy to be able to put the situation to bed.

The key is to just keep hassling them and not give in, as they operate with the attitude that most people wont bother for the hassle its worth

all sorted now, very disappointed by Tescos customer service and cannot say a good word at all about the Technika brand from what ive learnt, especially frrom staff, about their teles
#10
I've just had same problem with Tesco technika tv it was working 1 min and the next dead ant ideas guys?
1 Like #11
I was given a 32" Technika TV a few days ago by someone who had the same fault and who'd gone out and bought a new TV.

I'm an electronics engineer and after spending a few minutes poking around with my multimeter, found the problem.

On this set the problem was being caused by the mains switch itself. The switch is the small rocker switch on the underside of the TV. Both the live and neutral supplies are routed through this switch and the neutral side had what's known as a high resistance. This is usually caused by a build up of carbon on the contacts of the switch through repeated use and can cause your set to suddenly stop working, just as you guys have seen happen. It basically means that the 240V mains supply was being dropped to about 60V which is not enough to make the internal power supply kick in, hence even the TV's standby light not coming on.

I replaced the switch (which costs pennies) and hey presto the TV now works perfectly. It seems the rocker switch used on these sets is a cheap substandard component. It's easy to replace the switch but make sure the sets plug is removed from the wall socket before attempting ANY repair as mains voltage can be lethal. If you're at all unsure of what you are doing then please leave it to someone who's qualified.

Quite often a dead set will have a fault with either the plugs fuse, cable, power switch or internal power supply unit. The PSU for this particular set has part number MLT-333 which can be picked up on Ebay for £9.99. So in most cases it shouldn't cost you more than a tenner for the parts to repair this particular fault.

Like I said, this is what was wrong with this set. Yours may have a different fault but it's definitely worth you getting someone who's qualified to check your switch for you. Even if it turns out to be the PSU, spending ten pounds is a hell of a lot better than forking out for a new TV.

Hope this helps.


Edited By: MosherMike1138 on Nov 10, 2014 00:21: Clarify faulty part and warn of dangerous voltages
#12
thanks for that mosher, just clarified what i think the issue is with my 39" tech tv. mrs rang us at work to say it wouldn't turn on and was crackling when switch turned on. when checked it just listening sounded like the rocker was shorting or not making proper contact. need to find new switch - are the switches on these all the same? but as long as leave in stand by it works ...........now not the time for it to go completely billy bob.
#13
treborsrus
Are the switches on these all the same?

I can't be sure if they are ALL the same but certainly the ones I've come across are. The switch on mine is a DP/ST (Double Pole/Single Throw) switch rated at 250V. Cost me less then £1. Just check it's the same size before you buy it.
#14
where do I find the number for the PSU unit?? thanks
#15
sharon12345
where do I find the number for the PSU unit?? thanks

The part number for the PSU is actually written on the PSU itself. You won't be able find it without taking the back off your set. Different size TV's have different PSU's so you MUST make sure the replacement you buy is 100% identical but I'm quite confident you'll be able to find one on Ebay (I haven't failed yet).

Remember mains voltage can be lethal so make sure your TV is NOT plugged in when you take its back off. Also the PSU has some large capacitors which can store an electrical charge for some time so be careful. Like I said earlier in this thread, if you are not absolutely sure of what you are doing, get someone else who is to do it for you.

Once the back is off and you have located the PSU board you will find the part number written on the PCB itself. If there appears to be more than one number then do a search for each on Ebay. They may refer to the PCB Number, Assembly number or Revision numbers.

Usually only one of the numbers on your board will match any results that Ebay has to offer. Check the resultant picture matches that of your PSU before buying it.

If you're not sure then leave a message here and I'll see what I can do to help.

Mike
#16
Moshermike thanks for sharing that info you've saved me hundreds of quid on a new TV. Got a switch from maplin for 2 quid, all good. May good karma desend upon you
#17
Hi moshermike, fairly confident the rocker in my 32" technika TV has gone too, it's making that same crackling noise from the switch on the underside - is it easy to explain how to do, or do you know of a youtube video showing how to do it?

Nick
#18
HI Nick. I have got a Technikia 47' TV and my rocker switch has just given up on me last night. As for replacing it, I have taken the back of the TV and taken out the old rocket switch is really easy. The rocket switch is basically four small female ports, and the wire connecting to two it are male. Two are brown wires and the other two are blue. Once you get the new switch, you just have to plug the wires back into the new rocket switch and then it should work.
#19
Sorry "one post & never return newbs" MosherMike was LAST ACTIVE 4 months ago.

Go and spam some other forums than necro bumping our misc section and going awol afterwards.
#20
Hi. Just to confirm that is was my rocker switch that was broke. I fitted a new one yesterday and my TV is now working fine. The old one had some carbon on it, So I think that is the reason it stopped working.
2 Likes #21
sjproctor1981
Hi. Just to confirm that is was my rocker switch that was broke. I fitted a new one yesterday and my TV is now working fine. The old one had some carbon on it, So I think that is the reason it stopped working.

Sorry to bump an old thread, but I had the exact same problem, and this was the only place online to give me any clue as to how to fix it. Must be a Technika telly issue lol. Ordered a rocker switch for a couple of quid and fixed it, saving me getting a new telly or costly repairman. Thankyou :)
#22
My 32" Teknika TV has developed the same problem, taking several attempts to turn it on with the rocker switch under the TV, and the switch making a slight crackling sound.

What kind of rocker switch is it, or will I have to take the back off to find out?

Is it ok to leave in stand by until I can get it fixed?

Would it cause the same problem if I leave the TV in standby mode, and turn it off at the mains socket instead of using the switch on the TV?

Thank you.
#23
JillJay
My 32" Teknika TV has developed the same problem, taking several attempts to turn it on with the rocker switch under the TV, and the switch making a slight crackling sound.
What kind of rocker switch is it, or will I have to take the back off to find out?
Is it ok to leave in stand by until I can get it fixed?
Would it cause the same problem if I leave the TV in standby mode, and turn it off at the mains socket instead of using the switch on the TV?
Thank you.

The crackling sound is likely the switch arcing, providing it doesn't crackle when it is left on, leaving the switch permanently in the on position and powering the set on and off at the mains socket would be the best option until you fit a new switch.
1 Like #24
This is the one I used to sort mine out.
http://www.ebay.co.uk/itm/ROCKER-SWITCH-ON-OFF-TECHNIKA-32-56L-LCD-TV-Replacement-Repair-Television-/171629343208

JillJay
My 32" Teknika TV has developed the same problem, taking several attempts to turn it on with the rocker switch under the TV, and the switch making a slight crackling sound.
What kind of rocker switch is it, or will I have to take the back off to find out?
Is it ok to leave in stand by until I can get it fixed?
Would it cause the same problem if I leave the TV in standby mode, and turn it off at the mains socket instead of using the switch on the TV?
Thank you.

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