Vizio VX42L HDTV10A no ps on voltage

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • neatpathfinder
    Member
    • Feb 2016
    • 16
    • USA
    #1

    Vizio VX42L HDTV10A no ps on voltage

    I have a Vizio VX42LHDTV10A with power supply #0500-0507-0330 and main board #3642-0252-0150. The problem with the TV is an Amber LED. I have trouble shot the power supply and unplugged J1 from the main board and used a resistor to turn the power supply on PSON to 5V. All voltages check good from the power supply. When connected and turning the TV on I get no 3.3v to the PSON pin to start the power supply. On the main board I have 5v standby and 3.3v on U8 output. Fuse 1 and 2 ohm out as good and have 5v on F2 but no voltage on F1. I checked some of the other voltage regulatorS and they seem to have the correct voltages on them. I disconnected the IR board with no change in symptoms. Can someone lead me in the right direction to troubleshoot further?






















    Attached Files
    Last edited by neatpathfinder; 02-16-2016, 10:03 AM.
    Tags: None
    • neatpathfinder
      Member
      • Feb 2016
      • 16
      • USA
      #2
      Re: Vizio VX42L HDTV10A no ps on voltage

      Anybody got any thoughts?

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA
          #3
          Re: Vizio VX42L HDTV10A no ps on voltage

          How about the pictures of the whole backside of the TV so we can see how all the boards are connected together?
          You should also report the readings of the regulators in the format as shown in this thread: https://www.badcaps.net/forum/showth...999#post300999
          Last edited by budm; 02-18-2016, 12:32 PM.
          Never stop learning
          Basic LCD TV and Monitor troubleshooting guides.
          http://www.badcaps.net/forum/showthr...956#post305956

          Voltage Regulator (LDO) testing:
          http://www.badcaps.net/forum/showthr...999#post300999

          Inverter testing using old CFL:
          http://www.badcaps.net/forum/showthr...er+testing+cfl

          Tear down pictures : Hit the ">" Show Albums and stories" on the left side
          http://s807.photobucket.com/user/budm/library/

          TV Factory reset codes listing:
          http://www.badcaps.net/forum/showthread.php?t=24809

            Comment

            • neatpathfinder
              Member
              • Feb 2016
              • 16
              • USA
              #4
              Re: Vizio VX42L HDTV10A no ps on voltage

              Will do. Thanks

                Comment

                Previous template Next

                Related Topics

                Collapse
                • Tynan Dill
                  Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                  by Tynan Dill
                  I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                  Upon bringing it home and plugging it up, it showed a standby light.

                  I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                  The screen seems to blackout and stay black, but with a flashlight I can see the display.

                  With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                  Assuming...
                  ORIGINAL POWER SUPPLY BOARD
                  7 Photos
                  11-22-2024, 01:46 PM
                • sam_sam_sam
                  Adjustable Boost Power Supply DC-DC Constant Voltage Current Charging Module
                  by sam_sam_sam
                  I want to know if I could hook up a solar panels to this boost converter would I have any issues doing and I would have issues what would they be

                  Adjustable Boost Power Supply DC-DC Constant Voltage Current Charging Module

                  https://www.ebay.com/itm/116497313155?var=416785404161


                  Here are some of the description from the eBay seller

                  The main parameters:
                  1. Product name: High-power non-isolated DC boost module power supply.
                  2. Product model: 100A2000W.
                  3. Input voltage: DC12V-60V.
                  4. Input current: 100A (maximum)....
                  05-18-2025, 09:45 AM
                • Jembang
                  coocaa 50S5G smart tv dropped voltage when connecting power supply to mainboard
                  by Jembang
                  good day hoping someone can lend a hand, im repairing smart tv 50 inch, status when turning on back light is dim but you can see the tv logo then slowly fading out to black, i check the supply to tcon, i only read 5+v, must be 12v, i removed lvds cable and check voltage to mainboard turned on its also 5v, then i remove the cable mainboard to power supply, i read 12v in power supply, thinking that the problem is in the mainboard, coz theres 12v in power supply, i also check while turning on checking volts in main board 12v dropping to 5v, im just new repairing in TV, hope someone see my post t...
                  11-01-2024, 09:55 AM
                • Document Archive
                  LM358 LM358S-13 Datasheet
                  by Document Archive
                  The LM358 LM358S-13 consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage.

                  Application areas include transducer amplifiers, dc gain blocks and all the conventional op amp circuits which now can be more easily implemented in single power supply systems. For example, the LM358 series can be directly...
                  10-07-2024, 04:12 AM
                • sam_sam_sam
                  How to modify a switching power supply that has voltage/current adjustable but powering it from a battery pack
                  by sam_sam_sam
                  I have been pondering this question for a while but now I have see if this doable but I need to answer this question once and for all

                  I would like to know how to safely do this undertaking my first thought is to solder wires to the main filtering capacitors and see
                  what voltage I am getting and seeing if I can build a battery pack with voltage or not and if

                  I can find a BMS balancing protection board at this voltage level and weather or not do I have use more than one BMS balancing protection board...
                  05-11-2025, 05:22 PM
                • Loading...
                • No more items.
                Working...