Philips 42PF7621 flashing led

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • PowerAmpFreak
    Badcaps Veteran
    • Feb 2010
    • 982
    • Sweden
    #1

    Philips 42PF7621 flashing led

    Philips 42PF7621 LCD-panel, standby led flashes 8 times. (Chassis BJ3.0E)

    According to S/M this indicates a fault in the 1.2V DC/DC converter.
    This is probably located on the mainboard.

    I'm not quite familiar with the startup sequence, there are lots of different versions of this set with different config's of supplies and so on.
    I have a stable STBY +5V from the AUDIO and STANDBY board. Set tries to start up main PSU, begin to generate +24V and +12V lines.
    But clicks off second after.

    Anyway know if there are common faults on DC/DC part of mainboard?
    Attached Files
    Tags: None
    • PowerAmpFreak
      Badcaps Veteran
      • Feb 2010
      • 982
      • Sweden
      #2
      Re: Philips 42PF7621 flashing led

      Solved...blown smd fuse in mainboard.

        Comment

        Previous template Next

        Related Topics

        Collapse
        • STKR123
          Elitebooks (820, 840 etc. all gens) and those continuously flashing Power LED + flashing CapsLock LED
          by STKR123
          As the Elitebooks (820, 840 all gens) only show flashing Power LED and flashing CapsLock (continuously) + a very soft "ticking" noise near the DC Jack,
          I wonder if re-flashing the BIOS might be of any use here.

          As far as I understood, steady flashing either means insufficient power or a CPU/GPU/Motherboard issue. I use the original 65watt power supply.

          There are so many threads out there, but most of the solutions involve flashing codes, which I dont have or claim that you MUST use the original power supply, do a hard reset, reseat the RAM, clean the RAM,...
          11-03-2024, 06:58 AM
        • satinser
          Philips 32PFL9604H/12 mainboard likely
          by satinser
          As soon as plugged in at power socket TV starts up with Philips opening logo, screen then shows HDMI 4, then both picture and backlight go off but TV remains on and if any button on remote is pressed red led blinks fast. If mains plug is removed and plugged back in the same thing happens. Suspect it might be software on main board related issue. If anybody has the software for this model would be grateful. Have corrected many LG mainboards by reflowing at 200c in the oven does anybody know whether Philips mainboards are so oven friendly!
          05-06-2023, 07:00 PM
        • KevM
          Philips Pus 436401/12 flashing backlights question
          by KevM
          hi had loads of help from this forum getting TVs back up and running but seem to be hitting a brick wall with this one.
          Backlights failed before Xmas so ordered a new set and after replacing them and putting the set back together was delighted to see it work for 15 seconds only for the picture to flash on and off and a quick look round the back confirmed the backlights were flashing on and off

          I have a steady 44v at +vled and a fluctuating 0v to 10v at -vled when the light start flashing, a steady Bl-on voltage and steady dim voltage.
          If i disconnect 2 strings of leds...
          02-04-2022, 09:40 AM
        • Mirenia
          Dell Latitude 7420 - Touchscreen not working since Mainboard replacement
          by Mirenia
          Hi everyone,

          I've got a little "problem child": my Dell Latitude 7420 2-in-1, which had a faulty mainboard.
          I replaced it, but ever since, the touchscreen no longer works — and honestly, I’m running out of ideas…

          In Windows Device Manager, I just see an I2C HID Device with error code 10. Sporadically, the touchscreen is recognized correctly for just a few seconds, but I haven’t been able to determine under which circumstances this happens.

          The touchscreen also doesn’t work in UEFI/BIOS, although it’s enabled...
          03-30-2025, 06:47 AM
        • orcic
          MASTER TL240 and new mainboard LW36BKC01
          by orcic
          Hello,
          I have an old MASTER TL-240 LED TV. Since it stopped working and it had a DVB-T receiver that is being dismissed in Italy, I've decided to replace the mainboard with a DVB-T2 one.
          The original problem was that when switching on the TV, the power LED was transitioning from red to steady blue, without showing video or audio.
          After checking some voltages on the power supply board (HKL-240101-B Rev. 1.4, HKL from now on) someone suggested me to replace the mainboard.
          Now I have some doubts about how to connect the new mainboard to the old power supply.
          First of...
          05-12-2023, 08:10 AM
        • Loading...
        • No more items.
        Working...