Proscan 19LA20QW

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • PlainBill
    Badcaps Legend
    • Feb 2009
    • 7034
    • USA

    #1

    Proscan 19LA20QW

    This was a Craigslist special. The price was good - free. The gentleman even included the remote, the power adapter, and the original box. All that was missing was the Owner's Manual. The problem was described as 'started to cycle on and off constantly'.

    When researching known problems with this TV I discovered the power brick was a common failure point. This seemed to be confirmed when the power LED on the brick wouldn't come on. But a quick measurement showed 12.6 volts present.

    Unlike common designs, this power brick was actually held together by screws. Open it up, and sure enough, both output caps were bulging at the top. One had vented, the other blew out the bung!!!

    According to my inventory sheet, I should have had a pair of caps on hand, but they apparently had already been used (poor inventory control is one of my weaknesses). A little scrounging and I found a pair of Panasonic FCs in a failed repair job (not one of mine, fortunately). A little soldering and the power supply came back to life. And the TV lives!

    I found the brand name rather ironic.

    PlainBill
    Attached Files
    For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

    Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.
  • alexanna
    Member
    • Mar 2010
    • 1346

    #2
    Re: Proscan 19LA20QW

    Well a 12V power supply probably around 4A, Suspect a problem when a load applied.
    That's where an automotive headlamp comes in handy.
    Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!

    Comment

    Related Topics

    Collapse

    • spleenharvester
      GRT60-145410 brick PSU, how much of a fire hazard is this thing exactly?
      by spleenharvester
      I bought an Alpicool C20 fridge, which is a 60W compressor fridge that runs on 12V or 24V, which can come from either an AC/DC adapter from mains (240V here in UK) or a car battery. The fridge itself is really good quality, so I was surprised to find the power supply (DC14.5V, 4.1A) pretty questionable. Despite being 240V/1.5A the plug was fitted with a 13A fuse - concerning, but not all that uncommon for imported chinese electronics here. But when I felt how light the brick was I immediately said hell no and transferred the proprietary connector to a MeanWell GS90A12-P1M brick (this supply is...
      07-08-2025, 06:02 PM
    • UADmytro
      Lenovo T14 Gen1 i7 10  nm-C931 (brick)
      by UADmytro
      Hey! I bought a Lenovo T14 Gen1 i7 10 nm-C931 (a brick). The previous owner said he got it on eBay as a password-locked device and took it to a repair service, where they tried flashing something. The result: it doesn't turn on.

      When I plug in the charger, the charging LED lights up, and the power button indicator blinks three times.

      I downloaded the firmware from the official website, but it's incomplete. However, there is a firmware for the embedded controller (MEC1663). I did a mass erase via OpenOCD, wiped MEC1663 along with the EEPROM, and flashed an image from the...
      03-23-2025, 03:45 AM
    • sam_sam_sam
      They are closeing there doors for good when they sell out for inventory mpja.com/ sad to see them go
      by sam_sam_sam
      I have bought from them for many many years now

      https://www.mpja.com/...
      04-22-2025, 02:57 AM
    • CPUFiddler
      Acer Nitro 5 AN515-45 not charging
      by CPUFiddler
      Hi there. I am trying to repair an Acer Nitro 5 AN515-45 and it's giving me some trouble. I have access to SMD rework station, variable power supply, digital oscilloscope, thermal camera, multimeter, stereo microscope.
      This laptop will boot and run from the power brick and/or the internal battery, but it will not charge the battery. NirSoft BattInfo tells me the charge/discharge currents, so I'm confident in saying that it's not charging. In addition, there's no increase in voltage at the battery connector when the laptop thinks it's charging, not even a few millivolts.
      I've downloaded...
      03-19-2025, 07:44 AM
    • kokodin
      windows 10 embeded key on a desktop motherboard - inventory issue
      by kokodin
      Hello, a bit silly question here.
      I work at a school. we have IT class for computer assembling in a technical highschool and we kind of need more hardware for practicing.
      Computers we bought in 2019 had unsuficient motherboards for our regular clases so they were replaced before going online with computers for the first time and licences transfered to new motherboards. they are "windows pro for school" so as a school we are allowed to do that, we just can't have 2 computers with the same licence. So i have a stockpile of unused motherboards. Now that cpu's for them are a...
      02-06-2025, 02:35 AM
    • Loading...
    • No more items.
    Working...