vizio no backlights bad main or inverter help?

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  • x_orange90_x
    Vizio E55-E1 bad backlights or bad inverter?
    by x_orange90_x
    I just got this tv today and it appeared to have no backlight on. After taking off the rear cover and checking again in the dark I can see that MAYBE one quadrant is lit.. But still it's quite dim. I was going to check the LEDs with my tester, and I found LED 1 and LED 2 + pins on the wire from the inverter, but I couldn't identify a ground. Nonetheless I tried using a mounting screw on the inverter board and also the chassis as ground but regardless my tester reads 300 which is what it reads when there is no voltage draw.

    I don't know how exactly to test the inverter itself. Is it...
    01-29-2025, 09:24 PM
  • bpcannan
    VIZIO M557-G0: Backlights or ???
    by bpcannan
    'Morning,
    I get sound and picture when powering on the TV and its stays that EXCEPT that the left half of the screen will dim every few seconds then return to normal while the right side of the screen performs as designed.

    Did the soft and hard reset options pulling the plug, using the reet option in the vizio menu to no avail.

    I checked the mainboard - found some popped capacitors so replaced it - but that did not change the situation.

    I checked the t-con board. It is getting good power. Then I removed one ribbon cable to see if I could isolate...
    10-29-2023, 06:36 AM
  • csmith
    Vizio-D50u-D1 Pulsating Backlights
    by csmith
    This Vizio came in the shop with no backlights. Replaced all the strips with replacement from Shop Jimmy. Set now has backlights but lights pulsate on left side. Half the screen brightens up then goes to normal then repeats.
    Am I looking at a defective strip? Thanks in advance.
    11-07-2024, 02:56 PM
  • x_orange90_x
    Replacing backlights in Vizio V755-J04
    by x_orange90_x
    I've had this monster for several months as I've hesitated to order backlights for it. Finally did order them and they are due to arrive tomorrow. Besides having ample space to work, are there any recommendations for working on such a massive screen? Should I remove the panel by myself or would 2 people be a better choice? I bought the double-cup suction cups from Harbor Freight and have been using them for the last few repairs on smaller screens. They are far superior to the single cup orange ones I used previously that would often let go without warning 😱.

    I have not replaced...
    12-03-2024, 07:03 AM
  • lostone
    Looking for help with a Viewsonic VP230mb where the backlight comes on only momentarily
    by lostone
    Hello, I came here after finding some similar questions asked on other monitors and hope someone here can help me get an ancient Viewsonic VP230mp (23" 4:3 LCD) back to working condition.

    First a little background, I have a background in computer and electrical engineering, and I'm smart enough to know I know nothing about LCD displays and how they work. For this topic I'm as green as they come.
    When the display is turned on the viewsonic logo displays in the uppper left for 2 seconds then the screen goes black, the power LED is green (on) and when a computer is connected...
    05-19-2024, 11:40 AM
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