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Mark Evans Posted on Jun 22, 2007

TV remains in standby

All i get on my Tv at moment is the power light - but no picture or sound. When i turn the Tv power switch off the light goes off and when it comes back on i get nothing no sound or picture. Have got tw remotes that work with the Tv but both dont resolve the problem.

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koolguy1010

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  • Posted on Jan 23, 2008
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If your'e ok with a multitester a simple resistance test is all u need to do.Try checking the wire wound resistors in the psu cct

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  • Posted on Jun 25, 2007
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PRoblem is in the start-up circuit for the high voltage power side of the power supply. The 5 volt, stand-by circuit, is obviously fine. Need to take voltage measurements on start-up to 32kv side of transformer to diagnose. Possible flyback transformer or voltage regulator.

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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
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The clicking sound is from the main power supply relay being turning on and off, it is driven by hte main board and it gets the power from the standby power supply board.
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Please see my pictures here: http://s807.photobucket.com/albums/yy352/budm/Philips/Philips%2037PF9631D_37/

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
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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.
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