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Old 08-14-2013, 07:55 AM   #1
Paul Leadbeater
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Lightbulb LCD TV (Matsui) - Blank Screen, Inverter problem

I have a Matsui MAT15L607 Flat Screen TV with the following problem:-
TV turns on, screen lights up for 2 seconds then goes blank, sound is OK.
Picture can be seen faintly when shining a light on the screen.

I am fairly certain that this is due to a faulty Inverter board. I have also found out that the most common failure is faulty high voltage capacitors.

My problem is that I cannot find a supplier for replacement capacitors.
The inverter board is a Vestel 17IPS01-2 and the components are -
C354 - 4.7 pF, 3000 volt capacitor;
C355 & C356 - 12 pF, 3000 volt capacitors.

I'm capable of replacing these items if only I can find somewhere to buy them!

Any suggestions would be welcome. Thanks.
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Old 08-14-2013, 09:25 AM   #2
Caleb
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Default Re: LCD TV (Matsui) - Blank Screen, Inverter problem

In my limited experience, the inverter transformers are the most likely failure. If and when those little high voltage caps go its usually in a spectacular fashion with a big bang and magic smoke. Digikey will have those caps, not sure where you can find them on your side of the pond though, Tom may have some in his store. You can test the transformers with a multimeter on ohms if you find one that is not like the rest you will probably have the culprit, finding replacements can be difficult though.
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Old 08-14-2013, 09:57 AM   #3
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Default Re: LCD TV (Matsui) - Blank Screen, Inverter problem

12pF 3KV:
http://www.digikey.com/product-detai...070-ND/2589408

4.7pf (or 5pF) 3kv hard to find them in stock.
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Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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Old 08-14-2013, 10:40 AM   #4
Paul Leadbeater
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Default Re: LCD TV (Matsui) - Blank Screen, Inverter problem

Quote:
Originally Posted by Caleb View Post
In my limited experience, the inverter transformers are the most likely failure. If and when those little high voltage caps go its usually in a spectacular fashion with a big bang and magic smoke. Digikey will have those caps, not sure where you can find them on your side of the pond though, Tom may have some in his store. You can test the transformers with a multimeter on ohms if you find one that is not like the rest you will probably have the culprit, finding replacements can be difficult though.
Thanks Caleb. I've got a multimeter, so I'll have a look at the transformers.
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Old 08-14-2013, 10:42 AM   #5
Paul Leadbeater
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Default Re: LCD TV (Matsui) - Blank Screen, Inverter problem

Quote:
Originally Posted by budm View Post
12pF 3KV:
http://www.digikey.com/product-detai...070-ND/2589408

4.7pf (or 5pF) 3kv hard to find them in stock.
Thanks budm. I don't know if the shipping costs from America to UK would be too expensive, so I'll need to keep looking in this country.
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Old 08-14-2013, 11:12 AM   #6
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Default Re: LCD TV (Matsui) - Blank Screen, Inverter problem

http://www.ebay.co.uk/sch/i.html?_fr...V&LH_PrefLoc=1
both values listed
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Old 08-15-2013, 06:45 AM   #7
Paul Leadbeater
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Default Re: LCD TV (Matsui) - Blank Screen, Inverter problem

I don't know how I missed that! I've now ordered both items.
Thanks for the info.
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Old 08-15-2013, 06:47 AM   #8
Paul Leadbeater
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Default Re: LCD TV (Matsui) - Blank Screen, Inverter problem

Quote:
Originally Posted by vinceroger69 View Post
I don't know how I missed that!
I've now ordered both items.
Thanks for the info.
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Old 08-15-2013, 06:51 AM   #9
vinceroger69
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Default Re: LCD TV (Matsui) - Blank Screen, Inverter problem

glad the link helped you hope it fixes your issues.
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