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Power drive inverter makes a sound when shut off

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First of all, sorry for the mix up on model the model #. I was viewing a problem regarding LG LCD TVs and found your link. My problem is with an LG 42LGX LCD HDTV. It has worked fine without any issues...


Hi,

welcome to fixya and thank you choosing my service..

OK,that is the most and common problem of all LCD TV...

Usually dim and totally have no back-light is cause of bad inverter board.One of the inverter board is shorted that cause dim light and crackling sounds..

This are the sample images of inverter board.
1_22_2012_1_29_43_am.jpg

to make sure that the problem is on the inverter board kindly try to disconnect/unplug it from your TV and power ON then observe if the crackling sounds remain or not..If the crackling sounds gone replaced the inverter board..Also I need to how many inverter board you have? if 2 or more disconnect it one by one to determine if where is the specific faulty inverter board..

Example:
I disconnect #1 inverter still have crackling sounds..next disconnect #2 inverter and reconnect the #1 inverter until you found the faulty one..Note when you doing this make it sure you power off the TV before you unplug or disconnect inverter board because its high voltage..

I need the picture your TV screen..just send it to chesterpendilton@yahoo.com

Regards.
Chester

Jan 20, 2012 | LG 42LC2D 42 in. LCD HDTV

1 Answer

I have a 26' Toshiba LCD TV Model: 26WL65G. When I plug in and turn it on it seems to start normally, but when screen turns on blue screen appears as normal and it goes back to stand-by mode...


Note that if it is a backlight inverter board problem you will still have sound. SInce you have no sound I would suspect a power supply or main A/B board malfunction. Do you know how to use a multimeter?

Dec 11, 2011 | Televison & Video

1 Answer

30 KW F7 MODEL DRIVE GETTING CONTINOUSLY TRIPPING WITH OVER VOLTAGE ALARM ?


sounds like as transistor problem check transistors on heat sink and make sure no wires have come unsoldered and also check with a test meter to see if transistors are allowing current or have closed if closed no current replace.

Mar 18, 2010 | Inverter Yaskawa F7 Drive

2 Answers

When my batteries run low on power the generator starts up. Most of the time the system works perfectly, but lately the inverter will click and keep clicking and the batteries will not charge, then the...


please check the voltage your generator is supplying to the to the inverter because a high voltage and frequency can make the relays in the inverter to make clicking sounds,and also do not allow your inverter batteries to run completely low before you charge it

Jan 06, 2010 | Xantrex Technology Trace Series Inverter /...

2 Answers

Why does the power inverter keep beeping when i plug up my laptop


If your not getting enough voltage to the inverter it will beep to let you know you don't have enough power. Most common cause is a lose connection thru your cigarette lighter. Also if you turn your key off it might be shutting down power to your plug.
Make sure you have a good connection with your battery or plug adapter. You also need a good battery so you don't go into a low voltage condition which will make your inverter beep.

Oct 29, 2009 | Black & Decker Power Inverter PI400AB

1 Answer

Power drive 2000 INVERTER what does Lup stand for?


check the wires you either have a bad connection or a bad wire the power in verter has 4 wires 2 neg 2 pos if 1 of the 4 is loose or bad it will give lup code .

Aug 23, 2009 | Electronics - Others

2 Answers

Inverter shut off and turn back on..


Sounds like one of two things are happening:

1. Microwave is drawing too much current, causing internal voltage monitoring circuitry in inveter to go into protection mode.

or

2. RFI from microwave is somehow being few into inverter causing similar circumstance.

Feb 27, 2009 | Inverter Pure Sine Wave 1500w Inverter

1 Answer

I have a Panasonic Toughbook CF-51. It fell off


i repair laptop every day and i have never seen and inverter board shut down the computer.in less it was total shorted. it sounds more like the fall my have damaged the hard drive. if a the drive wont spin it will cause the laptop to power down cause the little motor will over heat in a matter of seconds.if the laptop was on when it fell then its more than lickly the drive.

Feb 20, 2009 | Panasonic Computers & Internet

1 Answer

Inverter not working


Inverter is charging battery but if I switch on load button , It starts making noise loudly. can you suggest solution

Feb 15, 2009 | Black & Decker 750w Power Inverter

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