Phillips 42PF7521D - Just Green LED - wont power up

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • noledud
    Badcaps Veteran
    • Dec 2013
    • 413
    • united kingdom
    #1

    Phillips 42PF7521D - Just Green LED - wont power up

    Hi All

    been a while but just got a Phillips 42PF7521D

    owner said it just wouldn't power on one day

    looked inside no obvious caps on PS but did find one on the zsus - c5040 100uf 50v

    replaced that but still the same issue

    when you plug it in you get the 2 clicks and LED's on PS light up then 4 seconds later as the main board LED's are flashing it shuts down

    then i get 3 flashes on the sub board on the top left of the PS pic

    its strange though as the LED on the front just stays green the whole time as if its on no red LED at all

    If i isolate the zsus the PS stays up, my question is does that mean its a zsus fault or when it trys to pull power thats when the PS fails ?

    there are 2 other caps on the zsus that look suspect but i will have to raid the spares bin as i dont have any 68uf 63v
    Attached Files
    Tags: None
    • selldoor
      Slow Learner
      • Dec 2010
      • 7870
      #2
      Re: Phillips 42PF7521D - Just Green LED - wont power up

      Did you test all the voltages out of the power supply - is fuse 5607 good?
      Please upload pictures using attachment function when ask for help on the repair
      http://www.badcaps.net/forum/showthread.php?t=39740

        Comment

        • noledud
          Badcaps Veteran
          • Dec 2013
          • 413
          • united kingdom
          #3
          Re: Phillips 42PF7521D - Just Green LED - wont power up

          Fuese on the zsus is good and all voltages are as expected until shutdown

            Comment

            • selldoor
              Slow Learner
              • Dec 2010
              • 7870
              #4
              Re: Phillips 42PF7521D - Just Green LED - wont power up

              Originally posted by noledud
              Fuese on the zsus is good and all voltages are as expected until shutdown
              I dont know which board 5607 is on - your pictures are not labeled - but it is in picture 2. If it is on the power supply and all voltages are good then fuse must be ok.
              Please upload pictures using attachment function when ask for help on the repair
              http://www.badcaps.net/forum/showthread.php?t=39740

                Comment

                • noledud
                  Badcaps Veteran
                  • Dec 2013
                  • 413
                  • united kingdom
                  #5
                  Re: Phillips 42PF7521D - Just Green LED - wont power up

                  ah thats on the zsus i only checked the normal fuse thats not in the picture

                  i will check that and come back thanks for the heads up

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK
                      #6
                      Re: Phillips 42PF7521D - Just Green LED - wont power up

                      Do you have Vs and Va?
                      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

                        • noledud
                          Badcaps Veteran
                          • Dec 2013
                          • 413
                          • united kingdom
                          #7
                          Re: Phillips 42PF7521D - Just Green LED - wont power up

                          fuse on ysus ok

                          when powered with ysus i dont get a stable reading its dropping off

                          when ysus is isolated the PS gives me

                          Vs - 212
                          va - 85.9

                          label reads VS 205 Ve 84

                            Comment

                            • noledud
                              Badcaps Veteran
                              • Dec 2013
                              • 413
                              • united kingdom
                              #8
                              Re: Phillips 42PF7521D - Just Green LED - wont power up

                              iv dropped the VS to 206 and its still the same, got some more tvs coming today so not got the room tempted just to part it out

                                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
                                • PantherDave
                                  Microsoft Surface Pro (5th gen) model 1796 - no power
                                  by PantherDave
                                  Hi all!

                                  I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅

                                  I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
                                  https://www.badcaps.net/forum/troubl...-hardware-devi...
                                  05-29-2024, 02:01 PM
                                • GLISIT
                                  Asus Probook P5440UF-XB74 power issue
                                  by GLISIT
                                  Hi all,

                                  TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!


                                  I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!

                                  A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about...
                                  01-16-2025, 02:29 PM
                                • sam_sam_sam
                                  Desoldering gun station modified to use a 18 volt @ 20 amp switching power supply
                                  by sam_sam_sam
                                  I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump

                                  One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy...
                                  03-31-2024, 02:12 PM
                                • Document Archive
                                  HP Pavilion Power Pavilion Power 15-cb009nl Notebook 15 Specification for Upgrade or Repair
                                  by Document Archive
                                  This specification for the HP Pavilion Power Pavilion Power 15-cb009nl Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Pavilion Power 15-cb009nl boardview and Pavilion Power 15-cb009nl schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that...
                                  09-06-2024, 05:59 AM
                                • Loading...
                                • No more items.
                                Working...