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Welling yxw40-20 need circuit to make it go on mains

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32 LG TV, no picture but have sound, replaced power board as well as main board, still no pic, but have sound model # 32LN530B


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Jul 07, 2017 | LG Televison & Video

1 Answer

My 60" samsung led tv has sound but no picture. Could not see backlights in the back as well. what do I need? My model number is UN06EH6003F


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Jan 12, 2017 | Samsung Televison & Video

1 Answer

RCA television is dark works well but hard to the picture


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Sep 27, 2016 | RCA Televison & Video

1 Answer

Seiki SE50FY10 no backlight


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board

Apr 29, 2016 | Seiki Televison & Video

1 Answer

Says busy in view finder


This is the sign of a failure of the main circuit, a well known problem with this model. The main circuit needs to be replaced and then initialized with software. You need to take it to a SPT member shop that has their software or send it to Canon. You cannot fix this yourself.

Oct 08, 2012 | Canon EOS Digital Rebel XS / 1000D IS...

1 Answer

Where is the main fuse 97 jetta


There are fuses within the engine room which are needed for main circuits and larger outputs as well as the fuse box within the cabin which mainly controls most of the accessories and circuits.

Nov 15, 2011 | 1997 Volkswagen Jetta

1 Answer

What would cause a 1200A CB Main at exterior switch-gear when running only a chill water pump? The chill water pump circuit breaker is on a 1000A CB panel main. The 1200A CB would trip but not the 1000A...


Well 1000 amp stuff is out of my league, but I would guess it is possible the main circuit board might have sensing ability to detect a wiring problem. Perhaps the 3 phase polarity is wrong, the 4th ground pole is not making good contact, or something. With that much amperage, it could be the main needs more grounding rods spread further apart, and make sure you run an explicit ground wire between pump and main. Don't rely on ground rod at pump. Too many people get electrocuted that way.

Feb 26, 2011 | RTO Ge Ted124010 Molded Case Circuit...

1 Answer

Power light flashes red 6 times. No picture.


The common fault often points the problem being to the power supply or the main printed circuit board.
If you are tech-savvy, you can open the back of the unit and measure, using a multimeter, the voltages from the power supply printed circuit board as well as the main printed circuit board, if the power supply is sending insufficient voltages, its common that you will get the flashing red lights.
Also check for any blown capacitors on the power supply as well as any shorted resistors. I hope this helps.

Aug 07, 2010 | Sony Grand WEGA KDF-55XS955 55" Rear...

1 Answer

SHUTS DOWN


Did you had a lighting strike the days before?
This is a typical behavior for some short circuit within the main circuit board. Another reason could be a defective part within the main circuit board.

In both ways the main board has to be replaced which costs more than a new mfc!

Dec 04, 2007 | Brother MFC-5440CN All-In-One InkJet...

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