Matsui 42 inch LCD stuck on standby Blue light

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  • newtothis
    Badcaps Legend
    • Mar 2013
    • 1556
    • england

    #21
    Re: Matsui 42 inch LCD stuck on standby Blue light

    Unless you want to learn how to repair boards I would suggest replacing the entire PSU.

    You said it before me

    Comment

    • vinceroger69
      Badcaps Legend
      • Mar 2012
      • 6714
      • uk

      #22
      Re: Matsui 42 inch LCD stuck on standby Blue light

      can you remove the ic to see how bad it is? have you got a soldering iron solder sucker/solder braid etc.

      Comment

      • Easky15
        Badcaps Veteran
        • Sep 2013
        • 285
        • Ireland

        #23
        Re: Matsui 42 inch LCD stuck on standby Blue light

        I actually wouldn't mind learning how to repair them, I get about 30 - 40 sets a month all faulty, I already bought the board but ill try removing it now anyway, Yeah i have an atten 8586 hot air/soldering station and a scottle ir pro sc v4, Got it to do xbox and ps3 repairs but rarely used it.

        Comment

        • Easky15
          Badcaps Veteran
          • Sep 2013
          • 285
          • Ireland

          #24
          Re: Matsui 42 inch LCD stuck on standby Blue light

          All the gear.. No idea.... :-)

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #25
            Re: Matsui 42 inch LCD stuck on standby Blue light

            Use wick and solder sucker to take that off, not hot air.
            Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
            For service manual, schematic, boardview (board view), datasheet, cad - use our search.

            Comment

            • vinceroger69
              Badcaps Legend
              • Mar 2012
              • 6714
              • uk

              #26
              Re: Matsui 42 inch LCD stuck on standby Blue light

              hope the board fixes it when you get a minute remove the ic so we can see the damage under/around it.wish i could get 30 to 40 sets a month here in the uk.

              Comment

              • Easky15
                Badcaps Veteran
                • Sep 2013
                • 285
                • Ireland

                #27
                Re: Matsui 42 inch LCD stuck on standby Blue light

                Removed.. :-)
                Attached Files

                Comment

                • Easky15
                  Badcaps Veteran
                  • Sep 2013
                  • 285
                  • Ireland

                  #28
                  Re: Matsui 42 inch LCD stuck on standby Blue light

                  ill cancell the board still if its fixable... :-)

                  Comment

                  • vinceroger69
                    Badcaps Legend
                    • Mar 2012
                    • 6714
                    • uk

                    #29
                    Re: Matsui 42 inch LCD stuck on standby Blue light

                    im not sure about the burnt pin area maybe budm or tom or someone experienced will advise if repairable the whole area by that ic looks like its had liquid spilt on it looks sticky/wet? maybe thats what blew the ic.

                    Comment

                    • Easky15
                      Badcaps Veteran
                      • Sep 2013
                      • 285
                      • Ireland

                      #30
                      Re: Matsui 42 inch LCD stuck on standby Blue light

                      Originally posted by vinceroger69
                      the whole area by that ic looks like its had liquid spilt on it looks sticky/wet? maybe thats what blew the ic.
                      I haven't cleaned the flux off after removing it if thats what you're looking at??

                      Comment

                      • vinceroger69
                        Badcaps Legend
                        • Mar 2012
                        • 6714
                        • uk

                        #31
                        Re: Matsui 42 inch LCD stuck on standby Blue light

                        i was looking at post 3 or 4 picks maybe that area was just really dirty around that area someone will along to advise youabout the pin burn area but for now at least u have a board on order.

                        Comment

                        • Easky15
                          Badcaps Veteran
                          • Sep 2013
                          • 285
                          • Ireland

                          #32
                          Re: Matsui 42 inch LCD stuck on standby Blue light

                          Ok, Thanks for your help vinceroger69

                          Comment

                          • newtothis
                            Badcaps Legend
                            • Mar 2013
                            • 1556
                            • england

                            #33
                            Re: Matsui 42 inch LCD stuck on standby Blue light

                            Ok.

                            Check for continuity between the red points.

                            Check Diode at blue points.

                            Check each resistor at purple points... These should all be 1M ohm

                            EDIT *** forgot to add image lol, Check next post

                            Comment

                            • newtothis
                              Badcaps Legend
                              • Mar 2013
                              • 1556
                              • england

                              #34
                              Re: Matsui 42 inch LCD stuck on standby Blue light

                              Test points
                              Attached Files

                              Comment

                              • Easky15
                                Badcaps Veteran
                                • Sep 2013
                                • 285
                                • Ireland

                                #35
                                Re: Matsui 42 inch LCD stuck on standby Blue light

                                Ok so i recieved the new board today and added it and still i have the blue standby light.. ?? Anyone any ideas where i check next

                                Comment

                                • vinceroger69
                                  Badcaps Legend
                                  • Mar 2012
                                  • 6714
                                  • uk

                                  #36
                                  Re: Matsui 42 inch LCD stuck on standby Blue light

                                  new board could be faulty as well just found this worth a check.
                                  17PW16-2. Also used in TV's by Sanyo, Bush, Hitachi, Vestel.

                                  Fault symptoms: Stuck in standby, main supply will not start up, no backlight.

                                  Solution: Found rectifier diode short circuit: D866 on the (unused on mine) 30v supply. 3A rectifier. Was loading the supply and caused shut down.
                                  also found this
                                  TV is no longer stuck in standby.
                                  A combination of stupidity and nearly dead remote batteries. DUH!
                                  Seems with this TV turning it on at the switch on the TV always puts it into standby, you then have to power it up with the remote..
                                  Last edited by vinceroger69; 12-12-2013, 08:46 AM.

                                  Comment

                                  • Easky15
                                    Badcaps Veteran
                                    • Sep 2013
                                    • 285
                                    • Ireland

                                    #37
                                    Re: Matsui 42 inch LCD stuck on standby Blue light

                                    Just tried the remote, Also no joy.. Could the main board cause this kind of fault or is it definately a bad psu. I have the old one to possibly take parts from to repair it but the thing is i paid for a working board so shouldn't have to, if its definately that at fault i will return it and buy another.. :-)

                                    Comment

                                    • vinceroger69
                                      Badcaps Legend
                                      • Mar 2012
                                      • 6714
                                      • uk

                                      #38
                                      Re: Matsui 42 inch LCD stuck on standby Blue light

                                      well i would for a start test all voltages on the connectors and see which you and whats missing write a list ie conn 1 pin 1 5volt- reads 5.3 volt etc then we should be able to work out if its a psu fault or mainboard fault

                                      Comment

                                      • selldoor
                                        Slow Learner
                                        • Dec 2010
                                        • 7870

                                        #39
                                        Re: Matsui 42 inch LCD stuck on standby Blue light

                                        Originally posted by Easky15
                                        Just tried the remote, Also no joy.. :-)
                                        Is the remote working does led flash on tv.
                                        Part test is to look at remote lens through digital camera.
                                        Please upload pictures using attachment function when ask for help on the repair
                                        http://www.badcaps.net/forum/showthread.php?t=39740

                                        Comment

                                        • Cobblers
                                          Senior Member
                                          • Jan 2016
                                          • 90
                                          • Uk

                                          #40
                                          Re: Matsui 42 inch LCD stuck on standby Blue light

                                          Originally posted by vinceroger69
                                          new board could be faulty as well just found this worth a check.
                                          17PW16-2. Also used in TV's by Sanyo, Bush, Hitachi, Vestel.

                                          Fault symptoms: Stuck in standby, main supply will not start up, no backlight.

                                          Solution: Found rectifier diode short circuit: D866 on the (unused on mine) 30v supply. 3A rectifier. Was loading the supply and caused shut down.
                                          also found this
                                          TV is no longer stuck in standby.
                                          A combination of stupidity and nearly dead remote batteries. DUH!
                                          Seems with this TV turning it on at the switch on the TV always puts it into standby, you then have to power it up with the remote..

                                          I have just spent 3 hours going round in circles checking voltages on a acoustic solutions lcd42761f1080p. I had no remote and bought it as faulty for £20. After reading this i tried the rc1205 i have for my hitachi and it came on staright away. How strange that the side button wont turn the set on. Do you think it is a fault with the set or is this by design?

                                          Comment

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