I have philips 42'' lcd tv its only 14 months old i have no picture but have sounnd is my tv still under waranty thanks gary

The power supply module or the backlights inverter board may have burnt out. Shop repair will run you $150 and up plus parts.
14 months old is really bad, I would contact Philips to see if they willing to repair it under warranty, you may not be the only one with this model with early failure.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

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.

lg 42 in lcd tv power button blinks nine times before staying on and has sound but no picture

Call Sharp for warrenty repair.This problem very common in Sharp tv.Picture will come on turn power on/off button few times will work.But still under Wareenty call to Sharp to replaced the main Tuner Signal board.

call the suggested retailer..

Must return for waranty repair ur main video board backlight is dead,the main video board no good.

Hold a flash light to the screen after it goes off and see if you can see a faint picture. Sounds like your backlight might be cutting off. Repair can be expensive but some of the newer units don't require the entire LCD to be replaced.

First of all the software update may not have been done yet, when tv's go through an update (depending on which update) the set can turn it's self off and seem to be done, but you need to wait it out and the set will turn it's self back on, Wait it out for about 30 minutes before doing anything. be paitent. UNPLUGGING THE SET CAN DAMMAGE THE TV DURRING A SOFTWARE UPGRADE!!!

If after a LONG period of time try unplugging the set and re-setting the micro. But only as a last resort!

If the upgrad failed and you can't get the set to function properly you need to change the ssb board. If the set is in waranty, waranty should cover this.

change the red wite and yallow wires around it shoud fix the problin

Hi,

I'll think your power supply is down.
Since your tv is 15 month old, you've still got waranty left.
Just contact you supplier or LG service.

Kind regards,
Gerard

My 42" Philips LCD did the same red blinking sequence last night. All was seemingly fine after unplugging it for a bit. An online search, though, has me worried that this may be the start of (potentially fatal) power supply issues. Anyone have a clue what that sequence means?

I've got one week left on my 1yr waranty, so I'm a bit concerned! :(

Thanks!