Samsung LN-T4661F standby/power up anomaly!

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Parklot91
    New Member
    • Dec 2013
    • 3
    • USA
    #1

    Samsung LN-T4661F standby/power up anomaly!

    My buddy has a Samsung LCD that had issues in the past with turning on and so he ordered the capacitor kit from LCD alternatives. Instead of fixing it he bought a new tv and threw this problem tv in the garage for six months.
    He just brought it over to my house and I replaced the capacitors for him. When we went to turn the TV on, nothing would happen. There was not even a standby light.
    After messing with all the ribbon cable connectors for awhile, we were able to get the standby light to come on and then the TV turned on when pressing the power button. The TV worked fine, picture was good.
    I now have come to realize that this issue is completely repeatable. Every time you unplug the TV from the outlet, it will not go into standby when plugged back in. I have to unplug and reinstall the large ribbon cable between the power board and the main board which has the HDMI ports. As soon as I do this the standby light turns on every time! I can them turn the TV on and it works fine. WTF! Thanks in advance for your guys assistance!
    Tags: None
    • freakaftr8
      Badcaps Legend
      • Oct 2012
      • 3743
      • USA
      #2
      Re: Samsung LN-T4661F standby/power up anomaly!

      Upon plugging it in check for standby 5v. If bit and unplugging and reseating the cable makes 5v come up look for a bad cap still in thw stb5v section of the power supply. Here I think heat of a hot air gun or hair dryer over the power supply and mainboard would help. Heat them up individualy when there is no light or power and see if it comes up.
      Did I leave the soldering iron on?

        Comment

        Previous template Next

        Related Topics

        Collapse
        • Espartaco Smith
          TV Samsung UE40MU6405U, not standby (after power failure)
          by Espartaco Smith
          Hello, as I mentioned in the title, I have a Samsung TV at home, model UE40MU6405U, which is about 5 or 6 years old.

          After a power company failure, the TV stopped turning on and even the standby light wouldn't come on. Over a period of about 10 seconds, the electricity kept going off and on repeatedly, and the TV died.

          The power supply is: L40E6_KSM (BN44-00875A)
          The main board: BN41-02568B

          The power supply board seems to be fine. All the voltages are present. If I disconnect it from the main board, I get backlight.

          I've also checked the...
          12-17-2024, 02:16 AM
        • Chris24
          Samsung UN58J5190 - Doesn't Power on and has Standby
          by Chris24
          Hey everyone - I have a Samsung UN58J5190 with these symptoms: Does not power on, has standby light, standby light blinks 5 times after pressing "power on." When plugged in the power supply is making a very faint ticking sound, and this goes away when pressing power on.

          Following instructions from the great team here in recent posts for Samsung with similar symptoms, I did the following tests:

          I tested with mainboard disconnected from power supply - backlights do not come on (symptoms no change/5 red blinks)

          I tested with T-Con disconnected...
          10-12-2021, 12:43 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
        • nathan425
          Samsung UN50EH5300 - No Standby LED, Backlights ON, No Power
          by nathan425
          Hello, I have a Samsung UN50EH5300 in my possession that I'm looking to bring back to life.

          Symptoms:
          • - no power
          • - no standby LED


          What I've done so far:
          - confirmed power supply is OK
          -- CN201 #4 showing 5.3V
          -- BD207 showing 5.3V
          -- removing the cable between the main board and the power board turns on the backlight.

          Pushing the power button on results in no change to any of the pins connecting the two boards.

          - function assembly appears to be NO GOOD
          -- there is no voltage showing on any of...
          11-01-2023, 06:34 PM
        • amennone
          Samsung UE50NU7090U , no power , no led standby
          by amennone
          By inserting power, on the diodes DM856...Dm859, there are 9 volts, when you press the power button the voltage is 12 volts, voltage present for a few seconds, then returns to 9 volts
          The power LED remains off, always.
          Reprogrammed Ic 503 = 25Q40 and IC 501 = 25Q80, downloaded from the site
          The situation remained the same​
          https://**************/dump/lcd_pdp_...oogle_vignette...
          11-17-2024, 04:28 PM
        • Loading...
        • No more items.
        Working...