The image of my TV Philips 58pfl9966 goes off for several seconds and comes back for a while, the it goes off again. Is t-con board the responsable of this ?

Possible t con board failure.

T con board is responsible for the final image that appears on set. If there are anomalies or issues with it they can be traced to that board.

T con board is responsible for picture image and aberrations are usually caused by an issue with that board.

T con board is responsible for the picture. Check it out.

Ask them to replace the t-con board. It could be a defect one.Good Luck.

Serge.

The tvs shops will cost u like around $300-350 for the board part that call the T-CON board and labors.The board that call the T-CON board it is shorting out and dying to causes this.This T-CON board sit in the middle at the bottom of the tv LCD screen panel.U have some basic mechanicals skills like take things aparts and putting it back together again?Yes,tries websites like Shopjimmy.com,Ebay.com to buy a new refurbish T-CON board for the replacement by ur self.The T-CON board probally will cost u like 80-90 dollars plus shipping.

You can try reseating the ribbon cable on the LCD panel first, but I have a feeling you have bad T-CON board (if the T-CON board is integrated into the LCD panel, then new panel will be needed)
See example of bad LCD panel/T-CON here:
http://s807.photobucket.com/albums/yy352/budm/LCD%20panel/

Basic LCD monitor and TV troubleshooting guide:
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 pictures: http://s807.photobucket.com/albums/yy352/budm/

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.

Yes,T-Con board is dead.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish T-Con board for the replacement.

This problems is the causes of the T-CON decoders board is dying.This T-CON decoders board sit at the bottom right in the middle of the LCD screen panel.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish T-CON decoders board for the replacement.

does it happen on the any input or just on tv setting?
if it's judt tv then sounds like the tuner, if it's on any input, then the video chip or a decoder on that board.