Question about Electronics - Others

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The inverter was working when I left the boat, I returned a week later and the inverter was off, no lights or anything. I've tried unplugging the mains electric, plugging back in and switching the inverter off then on again as it said to do in the manual, but nothing, I can't even find a fuse anywhere.

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Hi Janeosull,

There are all sorts of inverters on the market.

Could you comment back with the make and model please.

Also, ant information on how it was installed (hard wiring?), what it was operating, anything else that might be remotely related
Yhanks
Mike

Posted on Jan 30, 2010

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  • Master
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I have had this happen a few times.

Sadly replacement is the Best option.
Repairs can be %75 the cost of a new one.

The best invert we have been using is a Pure Sine 1500 watt inverter.

Sad news but hope this tip helps.

r/
David

Posted on Jan 30, 2010

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Hannspree HF289H Black screen SIngle orange light once and completely unresponsive


Hi,
There is two chance for theis problem. 1) there is missing voltage to the back light inverter boadr or 2) the back light inverer is faulty. Check the power supply volatge to the back light inverter board. Normally its 24v for all lcd back light inverters. If the power supply is ok then you have to replace the back light inverter board.

You can check is there is any picture on the lcd screen by the help of a tourch . light the tourch near to the lcd screen and wach the screen from different angel while the PC is in ON position.. in some angle you can see the shadow of picture if every thing else working fine except back light.

If so there is powersupply missing or back light iverter is faulty. You have to replace the back light inverter board with a new on because there is no repair possible with the board. Also the spares will very difficut to get.
Ajin

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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

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1 Answer

I have a Vizio VF550XVT1A. The screen started to


Hi Alfred Grace,

First of all, thank you for posting your question here at Fixya.

Based on the symptoms you've described, I don't believe that the backlights are already faulty. If backlights gone to malfunction, that are permanent, but in your case you've said that the TV power up fine for half an hour, this is an indication that the fault not came from the backlights but from the inverter boards. Inverter boards are the one giving high voltage to the backlight to light up, it has a built in protection circuit that will activate once there's a malfunction on the board to avoid further damaged because of high voltage output.
If you would like to fix it yourself, I would advice you to replace both the slave and master inverter board. I saw your board at shopjimmy.com. Click it HERE for the replacement. Replacing these boards are not technical, all you have to do is to unplug the unit overnight to drain any voltages from the power supply board, disconnect all connectors and then put-in the new boards. No soldering required. If just in case that the inverter boards are not the issue (I'm pretty confident that the power supply board is working fine), don't worry, the link I've provided accepted return, the fault is on the power supply board.

Hope I helped you.
Have a nice day!
Good luck and take care!

Jdvillanueva

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I have a Coby TFTV 4028 and the unit turns on via remote or manually. It goes to channel 3.1(hooked up to antenna) and there is only audio and no picture. I am unable to change channel, volume etc. by...


The tv still new only 1 week old?Yes,return it where u bought it and get a new tv replacement.No?This tv have a 2 long boards that call the LCD inverter boards each sides left and right sides of the tv.Could be etheir one of these two of this long LCD inverter boards it is dead.Must have electronic equipments to test to know exactly with one it is dead.These 2 long LCD inverter boards only job are to probvided a backlight to the tv LCD screen panel to get a pictures.Both of these long LCD inverter boards are not that exspensive and very easily to take the apart and replaced.Tries websites like Shopjimmy.com,Ebay.com to buy both long refurbishes LCD inverter boards for the replacement.

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The backlight controller is most likely faulty. It could be bad capacitors again, or the inverter board itself may need to be repaired - possibly faulty inverter(s). Try shining a torch close to the screen and see if you can see anything on the screen.

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Overload light on Aims 5000w inverter


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1 Answer

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Buy a different brand of inverter. Yours has developed a short which the protection circuit is catching. It then tries a restart but fails all over again. Most likely o/p short which looks like an overload to the inverter.

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1 Answer

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This is a problem I have experienced with my HP laptop as well. I found some info on this and was told that it was the inverter. I managed to fix this by finding the inverter and, unplugging both ends of it and plugging it back in. This fixed the problem and a week later its still working!

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Once you have removed the plastic cover from around the screen, you should see the inverter at the bottom. Re-seat the connectors, and see if this fixes it. If not, replace with inverter. The site below is an example of where you can buy one.

http://www.laptopbacklights.co.uk/

This may help you with the process

http://www.laptoprepair.co.uk/how-to-repair-backlight-inverter.htm

Hope this helps, let me know

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Thank you for your quick response.
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