On this unit the indicator light on the lower left hand corner of the unit is red when turned off, flashes green when coming on, and solid green when on. This goes through the normal progression, and the green light comes on but the screen still doesn't show anything for quite a while. Then the screen will flash showing a picture for a second and go black again. This will repeat several times before finally displaying a picture like normal. This whole process may take 10-30 minutes, less time the shorter amount of time its been turned off. Called the manf didn't give me much help said that the two main problems is the capacitor or the power board. How can I test to find out which one it is or if they are actually goood and its just a loose wire? Any schematics available?
SOURCE: I keep reading that I
If still under warranty have it returned or ask for extended
warranty.
If you need to DIY, you may need to open the unit
and check everything , just to insure you will be
ordering the right board .
You might be needing tools and equipment plus a
know how to troubleshoot electronic circuits,
Faults on power supply , checking for regulators
and oscillators.
Post so we can have it started ( DIY )
SOURCE: works fine for 10-15 minutes, then screen goes
It can be caused by unstable DC in the power supply due to bad DC filter caps, that will be the first place to look. I have a feeling that it may be the main board. Basic LCD monitor and TV troubleshooting guide: Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you. Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
http://www.shopjimmy.com/catalogsearch/result/?q=LG+37LC7D+
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/
Please leave rating if it helps.
SOURCE: Every day when I first turn on my LG HDTV model
The board that call the T-CON decoder board is dying this board job are decodering signal before it go to LCD screen panel.This T-CON decodering board sit in the middle at the bottom of the LCD screen panel.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish T-CON decodering board for the replacement.
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