Announcement

Collapse
No announcement yet.

sanyo dp42740 no startup no powerlight

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
    #1

    sanyo dp42740 no startup no powerlight

    anyone got a manual for this tv, only a little over a year old. voltages are not marked on ps. darfon powersupply, good news is a pabnasonic screen. no relay click when you try to start it only when you plug it in all fuses ok, all caps check out good,all diodes, resistors and the mosfets check ok. thinking maybe digital board but need sm to confirm.
    Tags: None
    #2
    Re: sanyo dp42740 no startup no powerlight

    Originally posted by awyatt2 View Post
    anyone got a manual for this tv, only a little over a year old. voltages are not marked on ps. darfon powersupply, good news is a pabnasonic screen. no relay click when you try to start it only when you plug it in all fuses ok, all caps check out good,all diodes, resistors and the mosfets check ok. thinking maybe digital board but need sm to confirm.
    What is the voltage on the PFC capacitor in the power supply?

    Does the power supply have the correct output voltages?
    Muh-soggy-knee

    Comment

      #3
      Re: sanyo dp42740 no startup no powerlight

      yes the power supply is working it has all voltages as it should it's hung in on with no video i need the print on the mainboard.

      Comment

        #4
        Re: sanyo dp42740 no startup no powerlight

        But what voltage do you get on the PFC cap? We need that number to know if the PFC Voltage booster is working or not.
        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

          #5
          Re: sanyo dp42740 no startup no powerlight

          bud the power supply is working all the voltages are there, where they should be the tv is stuck in on position. when you plug it in it tries to start up went sour while i was out and took some other board out. get a dim glowing screen no pic all voltages are where they should be. this one is under extended warranty and hasnt made a year yet. i would have attemped repair if i could have found a service manual and dont think the manual is out if so no one has it. lest none of the pay sites do. this one is not power supply, leaning toward main board, i will know tomorrow service man will be here.

          Comment

            #6
            Re: sanyo dp42740 no startup no powerlight

            confirmed control board or panel, tech just left. extended service contract paid off on this one. anyway i have it to play with.only wish i had the print on the cntrl board so i could really get it fixed. it is surface mount but no bga arrays on it.

            Comment

              #7
              Re: sanyo dp42740 no startup no powerlight

              When you say the control board was the problem. Is that the same as the logic board? Also does yours have the analog and digital tuner boards separate but connected? That's how mine is set up

              Comment

                #8
                Re: sanyo dp42740 no startup no powerlight

                awyatt, did the new control board fix the problem? I have the same set with the same issue.

                Comment

                Previous template Next
                Working...