My Vizio 42" [MOD V042LFHDTV10A] has a black screen [except on start-up when it displays "HDMI3" momentarily] but the sound works. I unplugged and depressed "On" button for 35 seconds. No change. There is no light when peering down through louvers. I was told that it was the back light.

SOURCE: help - 15 mth old 42" edtv "plasma" black screen" have power and sound

I had the same problem....wasnt the main board but the two smaller boards...vizio changed them and no problem since .....

SOURCE: Vizio 42 Plasma Pop

My 42 Inch Vizio experienced the pop of death out-of warranty. I bought mine at Sears and they sent a technician over within a day or so. It turned out to be in the power supply and they shipped a board right out. Total including parts and labor was $280. Although no expensive TV should die after less than 2-years, Sears seems to be able to deal with repair in the home without drama.

SOURCE: Vizio 42 inch remote is dead. Except volume up /

No,ur main reomte CPU is dead,this problem happen to many remotes in many tv models.Buy a new remote in this website 1-800-Remotes Factory Original.Get the same exact remote.

SOURCE: Vizio L32 stopped working.

I have seen this many times. The tv most likely has run its course. It could be the power supply or a lamp. Sounds more like a lamp, as you still have lights on your set. check around and get some prices on a lamp. you can have a local shop install it for you. or just replace the set.

Bud Martin

• 11361 Answers
• Posted on Feb 18, 2011

SOURCE: My 42" Vizio LCD HDTV

It can be the unstable power supply due to bad DC filter caps, bad T-CON boards, main board.
I would inspect the power supply first for caps with domed tops.
Basic troubleshooting guide here:
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: 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, long life rating such as PANASONIC FM or FC series.
Please leave rating if it helps.