Channel on then no signal

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • doodles1128
    New Member
    • Mar 2013
    • 2
    • USA

    #1

    Channel on then no signal

    I've seen some success with troubleshooting assistance for plasma tvs so I thought I'd give it a try. I have an LG 42PB4DA that I purchased just short of 5 years ago. And with the exception of one nagging problem, it's been a pretty good unit.

    My issue doesn't seem to be constant and not necessarily repetetive. I can turn on a station, sometimes AMC, sometimes FX and maybe one other channel but most frequently these two. It will come on for maybe 3 or 4 seconds, the screen will freeze then I will here a sound like it's winding down and it goes to NO SIGNAL. In order to get anywhere from this I have to wait till the station attempts to come back on and before it's fully back I have to turn the channel.

    I had read one time that a "fix" for this was to unplug the set when it happens and leave it unplugged for a couple of minutes. I assumed it was so all capacitors would discharge. However, it didn't resolve the problem.

    Then I had read something about a board that held channel information may be deteriorating.

    None the less, it's still a nagging problem.

    Anyone else see this or found a resolution?
  • DakotaKid
    Senior Member
    • Nov 2010
    • 165

    #2
    Re: Channel on then no signal

    Please put brand and model in title to get better response.

    Comment

    • doodles1128
      New Member
      • Mar 2013
      • 2
      • USA

      #3
      LG t.v. - 42PB4DA Channel on then no signal

      Thank you DakotaKid. New at this.

      Comment

      Related Topics

      Collapse

      • eccerr0r
        old X58 triple channel board... memtest86 memory speed?
        by eccerr0r
        Anyone run memory speed tests with an old X58-based triple channel 1st gen or any other >2 channel board? The one I have is a Gigabyte I think.

        Anyway I had four 4GB DDR3-1333 modules in the 6 memory slots and got around 11GB/sec memory speeds assuming that it went dual channel since it didn't have enough modules for triple channel. Now I stuck in two more 4GB modules, but they are DDR3-1600. I'm still getting 11GB/sec speeds according to memtest86...

        Just wondering, anyone do memory speed analysis on these triple (and higher) channel memory boards? Are there any...
        06-28-2025, 09:06 AM
      • HelpMeRepair
        Yamaha RX-A3010 left channel no signal
        by HelpMeRepair
        Hi everyone , I have a rx-A3010 that all alllll the channel working except of Front left , if someone can lead me on what to begin wit it would be very helpful

        what I did so far ,

        factory reset
        test all other channel
        tone test
        dissasemble and look , visual inspection witout full dissasembly
        looked at all the mosfet for temperature to see if they eas operating
        scratch my head couple of time

        thanks in advance all help is appreciated , service manual are welcome too ! =)...
        11-14-2024, 02:48 PM
      • spleenharvester
        Reverse engineering of 18650 4-channel tester
        by spleenharvester
        Hi friends

        I have reverse engineered this tester, schematic is attached and is complete except for capacitor values. These testers annoyingly have no model number but they are the ones you find on the first page of just about any website if you type in "18650 4-channel tester". There is also a 2-channel variant and a newer 8-channel variant. They are very cheap (about £15) and can measure voltage, current, internal resistance and capacity. They have a multicolour display for all these statistics. They also have terminal blocks so that if you want to use a breakout board...
        05-04-2025, 02:43 AM
      • AstutePauciloquent
        Requesting Help For GA-970A-DS3 rev. 1.0, No Post code, no RSMRST# signal
        by AstutePauciloquent
        Hi everyone, over the past few months i have taken a deep dive into motherboard diagnostics and I love the challenge. Currently im trying to learn all about the signals that travel around the motherboard, such as frequencies, enable signals High and Low logic states etc. And i have been learning to read and using the Schematics for this board that i requested here on Badcaps forum, from a few months ago, this is such a great place for these.

        I’ve been working on a GA-970A-DS3 (rev. 1.0) that does not post. This motherboard has been my main learning board. I would like share...
        11-23-2023, 11:02 PM
      • afminguela
        No signal right output master channel - TRAKTOR KONTROL S4 MK1
        by afminguela
        HI,

        i have a S4 MK1 and suddenly don't have signal at the right channel main output, both in rcd and trs outputs.

        One day I was plugging all the set ( Macbook air+ traktor kontrol) and when I play the first song, right channel was silent.

        i made all the silly checklist (SW mapping, connectors, swapping channels...etc)
        and I concluded that is a hardware issue.

        As both physical outputs are affected, I suppose it's something at the mainboard BEFORE the split. No item seems to be burned, or broken, at sightsee.

        Does...
        05-11-2023, 05:58 AM
      • Loading...
      • No more items.
      Working...