It can be bad power supply due to bad caps, over current draws as mention above by the circuits such as the backlights inverter boards. Inspect the power supply module first, try disconnecting the power cables to the backlights circuits to see if the TV will come back on.
Please read my guide to understand how it works before DIY repair.
If you are going to DIYand have proper tools, electronics knowledge, and know safety precaution thenplease read on:
Basic LCD monitor and TVtroubleshooting 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 Monitorspictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Parts: www.interliquidparts.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he canmake you a set of caps.
Or www.digikey.com,just make sure to use caps with low ESR, 105c, high ripple current and longlife rating such as PANASONIC FM or FC series.
The power trip off means that the main board has a short and so there is a high current drain which triggers the protect circuit to work and switch off.
So to trace it requires that the different driver sections be checked for possible high drain or heating. Check for dy points soldering.
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button on the TV while still holding down the Up Arrow button. The TV will turn off and then turn itself back on.802 views
Usually answered in minutes!
Found the problems. I've replaced capacitors rated from 470uf to 2200uf. This fixed the power supply problem. There was another problem on the inverter board. The fuse marked F003 (63v @ 0.5a) had blown, so I replaced this along with the capacitors and the TV now works fine.
I replaced all the capacitors just to be on the safe side.
Thanks for your help!
Hi, where did you source the replacement F003 fuse from?
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