No Picture or Audio on Insignia NS-LCD26A

Collapse
X
Collapse
+ More Options
Posts
 
  • Time
  • Show
Clear All
new posts
  • xelectech
    retired tech
    • Nov 2014
    • 238
    • USA

    #21
    Re: No Picture or Audio on Insignia NS-LCD26A

    Well, little progress to report, just note to self :

    Amazon showed up with 20 35v470uF Nichicon caps for 8 bucks, so got enough to go back and remove the 25v rated ones I tried (didn't help)
    The 'cap by the 7legged IC' on pwr bd is C519, 50v47uF was indeed bad, reads 2uF and several ohms esr, replaced it but set is still the same, power led blinks on momentarily and goes right out...tbc

    Comment

    • wukong543
      New Member
      • Aug 2018
      • 1
      • USA

      #22
      Re: No Picture or Audio on Insignia NS-LCD26A

      Researched online and found this thread and read about heating up the chip under the heatsink which is under the RF shield. I discovered that between the chip and heatsink they had put a 1/8" piece of rubber foam. Really? This doesn't conduct heat worth a crap. I took a 1500w heat gun and put it about 1.5" above the chip and applied heat constantly for 2 minutes. After that I pushed down on the chip and held it down until it cooled.

      I then applied CPU thermal paste and put the heatsink directly on to the chip
      and set up the TV and turned it on without reassembling and the picture came up fine.

      So, I put the rubber foam spacer at the top of the heatsink to keep the same amount of space and tightened the two screws down on the RF shield which caused the heatsink to come up off the chip. I placed a small piece of metal on top of the rubber to keep the heatsink from coming off the chip and tightened it up and reassembled the t.v.. So far it's been running fine for the last 7 hours.

      Old thread and old t.v. but maybe someone like me still has one they want to fix.

      Comment

      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...
        11-22-2024, 01:46 PM
      • m1ch43lzm
        HP Pavilion 15-eh Board DAG7HAMB8F0 - CPU throttling to 0.4GHz (PROCHOT_EXT) and black screen
        by m1ch43lzm
        Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
        Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic...
        05-12-2025, 08:37 PM
      • grimacelord
        MacBook Air 2337 - Right I/O Board Audio IC - Alternative Replacement?
        by grimacelord
        Hello,

        I'm working on a MacBook Air A2337 that had liquid damage on the right I/O board. I ultrasonic cleaned the board and it all functions except the computer has no audio. I tried reballing the audio IC which is TAS5770AC0, but that did not restore audio. I could just replace the entire board, but I wanted to see if replacing the audio IC would fix it first. Mouser has a similar audio IC in stock which is TAS5770LC0YFFR, but I wasn't sure if it is compatible. I was just wondering if anyone knew if I could use the one from mouser as an acceptable replacement or if I need to purchase...
        12-11-2023, 11:13 AM
      • Document Archive
        Lenovo ThinkPad P43s Mobile workstation P Specification for Upgrade or Repair
        by Document Archive
        This specification for the Lenovo ThinkPad P43s Mobile workstation 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 P43s boardview and P43s 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 any specification, datasheet, or download for Lenovo...
        09-06-2024, 09:40 AM
      • Document Archive
        Lenovo ThinkPad P43s Mobile workstation P Specification for Upgrade or Repair
        by Document Archive
        This specification for the Lenovo ThinkPad P43s Mobile workstation 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 P43s boardview and P43s 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 any specification, datasheet, or download for Lenovo...
        09-06-2024, 09:40 AM
      • Loading...
      • No more items.
      Working...