philips 37" lcd blinks and wont turn on,,

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  • cadar21
    Senior Member
    • Oct 2010
    • 53
    #1

    philips 37" lcd blinks and wont turn on,,

    Hi..I have a Phillips 37PF9431D/37 LCD TV (37"). It quit working. Now all I get is a red blinking light (power). It starts green then it has one long red blink followed by two faster short blinks, then repeats the same cycle....

    i googled the problem and all mi got is that it needs a firmware upgrade....
    i downloaded the firmware...formated the usb to FAT 16...AND STILL NOTHING...
    i opened the back and all the caps look good...

    Do you guys have any suggestions...???. ( i also read a diode can be the problem bu t i couldnt figure out which one...)
    Tags: None
    • RON_CET
      Badcaps Veteran
      • Jun 2012
      • 217
      • USA
      #2
      Re: philips 37" lcd blinks and wont turn on,,

      power supply check for open resistor location 3318 see attached image
      Attached Files
      Ron Driver,BSEE,CET,ISCET,NESDA

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA
          #3
          Re: philips 37" lcd blinks and wont turn on,,

          So they updated that 100 Ohms 1/2 Watt high frequency surge limiter resistor to 470 Ohms 1 Watts for this capacitive power supply. I still use 100 Ohm but changed it to 1 Watts, still running for almost 2 years now. I may find the time to put in 470 Ohms instead if the resistor goes out again. Thanks for the info Ron. I knew it was a bad design when I saw the 1/2 Watts resistor.
          http://s807.photobucket.com/albums/y...037PF9631D_37/
          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

            • cadar21
              Senior Member
              • Oct 2010
              • 53
              #4
              Re: philips 37" lcd blinks and wont turn on,,

              sorry my wireless signals been weak and havnt been able to connect,,,
              RON_CET--- how do i check if its open...???

              ive never had this type of problem come up when working on boards....ive been lucky and only had to replace capacitors....and the chips if a Sony XBR400 TV....
              Last edited by cadar21; 10-13-2012, 09:10 PM.

                Comment

                • Mr Bill
                  Badcaps Veteran
                  • Nov 2011
                  • 648
                  • USA
                  #5
                  Re: philips 37" lcd blinks and wont turn on,,

                  I would imagine if it's open it would read OL on your meter. What are you getting at location 3318? All the resistors i've ever seen that have failed read way high.

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA
                      #6
                      Re: philips 37" lcd blinks and wont turn on,,

                      It should read 100 Ohms right now if it is good.
                      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

                        • cadar21
                          Senior Member
                          • Oct 2010
                          • 53
                          #7
                          Re: philips 37" lcd blinks and wont turn on,,

                          i think the battery on my meter is dead......shutts off after 5 sec.....
                          Dang..ill have to get back to you tomorrow after i buy a new 9v...

                            Comment

                            • cadar21
                              Senior Member
                              • Oct 2010
                              • 53
                              #8
                              Re: philips 37" lcd blinks and wont turn on,,

                              Sorry you guys ...my meters dead....it wont read anything...gives me 0.00000
                              ill have to post back when i by a good one....these Cen-tech voltage meter dont work well with me........

                                Comment

                                • cadar21
                                  Senior Member
                                  • Oct 2010
                                  • 53
                                  #9
                                  Re: philips 37" lcd blinks and wont turn on,,

                                  Just got to work on the tv today....
                                  Mr Bill...I bought an analog meter....measured it at (x1K) and the resistor read off the scale...was crazy .... so i thought i messed up and i changed to ( x100) read - 2 - .
                                  Then the tv turned on....weirdest thing...then i updated the software ( since the tv was working) turned off the tv like it instructed me to ... went to turn on the tv...SAME PROBLEM.... blinked the same code..
                                  I reconnected the meter..at (x100) and it turned on again.... so watched tv for about 3 hrs... then i decided to inform you guys on my progress....

                                  1. do you think the resistors just getting stuck...
                                  2. can i buy that resistor at Radioshaq.??? i have no idea what to buy there are no readings on it..
                                  and which one to purchase.
                                  Last edited by cadar21; 10-21-2012, 07:23 PM.

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA
                                      #10
                                      Re: philips 37" lcd blinks and wont turn on,,

                                      So you are using your analog meter which has low very low input impedance compared to the Digital meter while the TV is plugged in?
                                      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

                                        • cadar21
                                          Senior Member
                                          • Oct 2010
                                          • 53
                                          #11
                                          Re: philips 37" lcd blinks and wont turn on,,

                                          yes....

                                          can you tell me if this resistor is a good by...
                                          ---- NTE 1W447-10 *** 1W 470K OHM Metal Oxide Film Resistor
                                          Model:1W447-10 | Catalog #: 55047924

                                          or this one
                                          --- NTE 1W433-10 *** 1W 330K Ohm 2%
                                          Model:1W433-10 Catalog #: 55049641
                                          Last edited by cadar21; 10-21-2012, 07:46 PM.

                                            Comment

                                            • budm
                                              Badcaps Legend
                                              • Feb 2010
                                              • 40746
                                              • USA
                                              #12
                                              Re: philips 37" lcd blinks and wont turn on,,

                                              It should be 470 Ohms, not 470,000 Ohms.
                                              By the way, be careful when probing around that circuit, it is in the Primary AC hot side, do not anything with your body's part.
                                              Last edited by budm; 10-21-2012, 10:20 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

                                                • cadar21
                                                  Senior Member
                                                  • Oct 2010
                                                  • 53
                                                  #13
                                                  Re: philips 37" lcd blinks and wont turn on,,

                                                  Oh i see no k after the ohms.....
                                                  Are these ok... these are available through Radio shack-- i dont by online...
                                                  Which would be best...????
                                                  1..330 ohm 1/2W 5% ( i know it should be 1w )
                                                  2..470 ohm 1/2W 5%
                                                  3.. 680 Ohm 1W 2% ( is this overkill)
                                                  4.. 680K Ohm 1/2W 2%
                                                  5.. 330Ohm 1W 2%
                                                  6.. 500 Ohms 3W 5% Silicone-coated Wirewound Resistor

                                                    Comment

                                                    • budm
                                                      Badcaps Legend
                                                      • Feb 2010
                                                      • 40746
                                                      • USA
                                                      #14
                                                      Re: philips 37" lcd blinks and wont turn on,,

                                                      You can use 330 Ohms 1W.
                                                      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

                                                        • cadar21
                                                          Senior Member
                                                          • Oct 2010
                                                          • 53
                                                          #15
                                                          Re: philips 37" lcd blinks and wont turn on,,

                                                          Thanks budm.. ill order that tomorrow....

                                                            Comment

                                                            • cadar21
                                                              Senior Member
                                                              • Oct 2010
                                                              • 53
                                                              #16
                                                              Re: philips 37" lcd blinks and wont turn on,,

                                                              sorry for the wait.. i did ordered the resistor on the 24th... it should be here on the 30th...
                                                              so IL post back then...
                                                              Last edited by cadar21; 10-27-2012, 10:22 AM.

                                                                Comment

                                                                • cadar21
                                                                  Senior Member
                                                                  • Oct 2010
                                                                  • 53
                                                                  #17
                                                                  Re: philips 37" lcd blinks and wont turn on,,

                                                                  is there a certain way to solder a resistor.... i dont want to install it backwards....
                                                                  Last edited by cadar21; 10-30-2012, 07:34 PM.

                                                                    Comment

                                                                    • Mr Bill
                                                                      Badcaps Veteran
                                                                      • Nov 2011
                                                                      • 648
                                                                      • USA
                                                                      #18
                                                                      Re: philips 37" lcd blinks and wont turn on,,

                                                                      Originally posted by cadar21
                                                                      is there a certain way to sauder a resistor.... i dont want to install it backwards....
                                                                      There is no "direction" for installing a resistor

                                                                        Comment

                                                                        • cadar21
                                                                          Senior Member
                                                                          • Oct 2010
                                                                          • 53
                                                                          #19
                                                                          Re: philips 37" lcd blinks and wont turn on,,

                                                                          great so it works either way.... i thought the color coding was a direction

                                                                            Comment

                                                                            • cadar21
                                                                              Senior Member
                                                                              • Oct 2010
                                                                              • 53
                                                                              #20
                                                                              Re: philips 37" lcd blinks and wont turn on,,

                                                                              Thanks for the help you guys.... i installed the new resistor last night... the tv turns on and worked great... i unplugged it for half an hour to make sure its ok.... plugged it back in...and is still working fine..... Left it plugged in all night and turned it on this morning and its perfect.....

                                                                              So thank you all for your help.... ill post again when i need help.... and ill help those that need help by referring them to this site....

                                                                                Comment

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