TV powers OFF when cable box or DVD player is connected, why?

SOURCE: Vizio P42HDTV Power on Diagnosis

Please check the U29 8 pin little surface mount mosfet it has this letters > FDS4935 > > In this part inputs 13.2 volts which is ok for the near 12 vdc but it > outputs 1.250 vdc i am 100% sure that this is all the problem > > check it out, and tell me if you´re agree with me > > On this output pin it feeds the audio Ic, the 7809 and the tuner side board > which needs de 12vdc too and its getting only the 5vdc part > > what do ya think?? > > Richard

SOURCE: 50" Vizio Plasma reads "No Signal" on all inputs?

Well, your TV is still under warranty. That's the good part.
The only thing I can recommend without voiding the warranty is leaving the TV unplugged for 30min. That way, the TV can reset itself and hopefully correct the problem.

If that doesn't solve the problem, it's time to use the VIZIO warranty.
Here's contact info if you need it.

Technical Support
Toll-Free: 877.698.4946
(877 MY V I Z I O)
Technical Assistance Emails:
[email protected]
Customer Service
Toll-Free:888.849.4623
(888 VIZIO CE)

SOURCE: my lcd tv makes a humming noise

My 37 inch vizio did the same thing. go to your menu screen on the tv and go sound. My tv has an option to turn speakers on/off. Once I turned my speakers off and the back on again everything worked great. hope I helped! if I did please let me know! youtube.com/xniax1

Jerimy Smith

• 10 Answers
• Posted on Oct 10, 2009

SOURCE: Vizio L32 32 in. HDTV LCD HDMI input not working

I recently had the same problem with my vizeo hdmi port # 1 going bad. Tried everything to fix and called vizeo. There solution for a master reset was turn off tv and unplug from the wall. then hold down the power button for 30 secs and let go. plug the tv back in and hold down the volume down and input select buttons down on side of the tv for 15 secs. release the buttons and turn the tv on after powering down all the components connectd to the tv. If this does not work they told me you need to have it sericed for a bad hdmi input. Hope this info helps anyone out there. It didn't work for me. Its a bummer cause the tv is well taken care of and only 18 months old. Best of luck to all others.

SOURCE: Purchased and set up both Vizio SV370XVT HDTV and

Try setting your cable box for Closed Captioning. Worked for me.