Question about Sylvania LD370SS8 37 in. LCD Television

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How much for an inverter board? - Sylvania LD370SS8 37 in. LCD Television

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$50 on EBAY, http://cgi.ebay.com/SYLVANIA-LD370SS8-INVERTER-BA71G0F01042-/120706073069

Also check www.shopjimmy.com

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

Posted on Apr 20, 2011

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Posted on Jan 02, 2017

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hi, Your tv has problem with its back light inverter stage. All LCD TV have back light to illuminate the pixels. There are two types of back lighting CCFL(Cold Cathode Fluorescent Lamp) and LED. In your tv its ccfl. As it is ccfl it need a high voltage above 1000v. To provide such a high voltage there will be an inverter stage in all lcd tv with ccfl back lighting. Normally in LCD tvs there will be three boards such as Mother board , Back light inverter board, and power supply. In your tv the ccfl back light inverter stage is faulty. There will in inverter transformers in the inverter board. As it is high voltage transformer there is possibility of its winding get shorted. If so it will drain a high current from the power supply and the protection circuit will shut down the voltage to the inverter board. check the inverter board first. Also there is possibility of bad electrolytic capacitors in the inverter board will lead to this type of problem. First of all check the supply voltage from the power supply to the inverter board. Change the electrolytic capacitors in the inverter board and in the power supply stage. If the problem is not rectified then you have to replace the inverter board. ok

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Hi,
You have to check the back light inverter of your lcd tv. In all lcd tvs there are back lights to illuminate the pixels. There are two types of back lighting in use . CCFL ( cold cathode fluorescent lamp) and LED (light emitting diode). In you your tv it will be CCFL. If it is CCFL then it need an inverter (voltage step up circuit) for getting its working voltages. Normally it will produce above 1000V in low current. In the inverter circuit there will be inverter transformers. If the winding of the transformer get shorted then the inverter will drain a high current from the power supply. If so then the current sensing circuit senses the same and it will shut down the power supply. That's why it do the cycle ON an OFF repeatedly.
Just check the inverter board. Normally there will be three circuit boards in LCD TV. Mother board, SMPS (switch mode power supply) and inverter board. In some tvs the SMPS and inverter bord will com-pained as one board. you have to check the inverter transformers. there will be 4 or 6 inverter transformers. if available replace the inverter board as a whole.
Also check the electrolytic capacitors in the power supply. if any of the capacitor seems like one that in the picture, then replace the same and then only go for the inverter board



ajin_g_8.jpg ok

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you need to check first the power supply board whether the output supply 12-24vdc for the inverter board is stable and not flactuating..you can measure the output voltage with a multitester..you get a voltage output of 12-24 with the inverter board is connected or loaded to the system.be carefull of the high voltage at the inverter board..once the output is stable replace the inverter board or you can measure the output of the inverter be very carefull..the output range upto 500vac.be carefull..if the high voltage is stable replace the lamps...tnx and good luck..

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