Your browser isn't supported
It looks like you're using an old web browser. To get the most out of the site and to ensure guides display correctly, we suggest upgrading your browser now. Download the latest:

Welcome to the MSE Forums

We're home to a fantastic community of MoneySavers but anyone can post. Please exercise caution & report spam, illegal, offensive or libellous posts/messages: click "report" or email forumteam@. Skimlinks & other affiliated links are turned on

Search
  • FIRST POST
    • rmg1
    • By rmg1 13th Jan 18, 1:53 PM
    • 2,917Posts
    • 744Thanks
    rmg1
    Acoustic solutions lcd42761f1080p
    • #1
    • 13th Jan 18, 1:53 PM
    Acoustic solutions lcd42761f1080p 13th Jan 18 at 1:53 PM
    Hi all

    I've got the above tv that's gone iffy.
    I've got power as the standby light come on (it's a blue led).

    No matter what I press, the same led just flashes and nothing else happens.
    That's on the tv and on the remote.

    I can't find the manual to do any troubleshooting.

    I've taken the back off any can't see any obvious bad caps or anything else.
    There doesn't seem to be any large amount's of dust and all the connections seem to be solidly in place.

    Anyone any ideas?
    Flagellation, necrophilia and bestiality - Am I flogging a dead horse?

    Any posts are my opinion and only that. Please read at your own risk.
Page 1
    • pmartin86
    • By pmartin86 13th Jan 18, 2:08 PM
    • 527 Posts
    • 324 Thanks
    pmartin86
    • #2
    • 13th Jan 18, 2:08 PM
    • #2
    • 13th Jan 18, 2:08 PM
    After yopu ahve turned it "on" get a toch and get very close to the screen - can you see a very faint/dark picture? Can you hear audio?
    • rmg1
    • By rmg1 13th Jan 18, 2:24 PM
    • 2,917 Posts
    • 744 Thanks
    rmg1
    • #3
    • 13th Jan 18, 2:24 PM
    • #3
    • 13th Jan 18, 2:24 PM
    I either get a static blue LED (i.e. standby) or a flashing blue LED and no other reaction from the tv
    Flagellation, necrophilia and bestiality - Am I flogging a dead horse?

    Any posts are my opinion and only that. Please read at your own risk.
    • agrinnall
    • By agrinnall 13th Jan 18, 4:39 PM
    • 20,333 Posts
    • 16,087 Thanks
    agrinnall
    • #4
    • 13th Jan 18, 4:39 PM
    • #4
    • 13th Jan 18, 4:39 PM
    I'm not sure that the manual would be a great deal of help, this is what the manual for another model, the LCD3276HDF, says about No Power:

    If your TV system has no power, please check the main power cable and connection to the
    mains socket outlet

    https://www.manualslib.com/manual/619005/Acoustic-Solutions-Lcd32761hdf.html?page=42#manual
    • rmg1
    • By rmg1 13th Jan 18, 8:43 PM
    • 2,917 Posts
    • 744 Thanks
    rmg1
    • #5
    • 13th Jan 18, 8:43 PM
    • #5
    • 13th Jan 18, 8:43 PM
    I've seen that one.
    I can't find any sort of troubleshooting information for it either.

    I'm guessing it might be the power board but I'm not 100%
    Flagellation, necrophilia and bestiality - Am I flogging a dead horse?

    Any posts are my opinion and only that. Please read at your own risk.
    • rmg1
    • By rmg1 27th Mar 18, 2:14 PM
    • 2,917 Posts
    • 744 Thanks
    rmg1
    • #6
    • 27th Mar 18, 2:14 PM
    • #6
    • 27th Mar 18, 2:14 PM
    Thought I'd resurrect this thread as I've figured out it's the main board not the power board I'm now looking for.
    The power board is fine (I've checked all the outputs at the cable connectors and all seems good).

    So, I need a mainboard for the above TV which has screen LC420WUN but I'm struggling to find one.

    Anyone any ideas?
    Flagellation, necrophilia and bestiality - Am I flogging a dead horse?

    Any posts are my opinion and only that. Please read at your own risk.
    • Colin_Maybe
    • By Colin_Maybe 27th Mar 18, 2:34 PM
    • 2,227 Posts
    • 1,034 Thanks
    Colin_Maybe
    • #7
    • 27th Mar 18, 2:34 PM
    • #7
    • 27th Mar 18, 2:34 PM
    Thought I'd resurrect this thread as I've figured out it's the main board not the power board I'm now looking for.
    The power board is fine (I've checked all the outputs at the cable connectors and all seems good).

    So, I need a mainboard for the above TV which has screen LC420WUN but I'm struggling to find one.

    Anyone any ideas?
    Originally posted by rmg1
    Is this not it?

    https://www.ebay.co.uk/i/282530595289?rt=nc
    • rmg1
    • By rmg1 27th Mar 18, 4:01 PM
    • 2,917 Posts
    • 744 Thanks
    rmg1
    • #8
    • 27th Mar 18, 4:01 PM
    • #8
    • 27th Mar 18, 4:01 PM
    Unfortunately not, I've seen that one but the connectors are a different layout.

    I thought it was this one:-
    https://www.ebay.co.uk/itm/MB-FOR-ACOUSTIC-SOLUTIONS-LCD42761F1080P-TV-17MB35-1-20443075-SCREEN-LC420WUD/273101140102?hash=item3f9618b086:g:7~EAAOSw4A5YqGu ~

    as the layout is very similar (I can't say for definite that it's the same without getting one) but the seller says not.

    There are a load of stickers on the board as follows:-
    White sticker:-
    10062583 20447808 146 42"
    26474215 LGWUN_SG(I think)B1 GB
    891S PIX

    White sticker where the aerial would go in:-
    TDTC-G101D
    30063523
    (There's something else on there but it's covered by some sort or QC sticker).

    Green sticker near middle of board:-
    446909 74215
    UK8.10 HY L8
    10/04-8/20-99

    There's a reference on the back of the board that says:-
    HannStar J MV-4
    94V-O 0906

    There's also another sticker (slight buried under the chassis) that says:-
    LC420WUN
    (SB)(A1)
    Last edited by rmg1; 27-03-2018 at 4:04 PM. Reason: Extra info
    Flagellation, necrophilia and bestiality - Am I flogging a dead horse?

    Any posts are my opinion and only that. Please read at your own risk.
    • that
    • By that 27th Mar 18, 4:57 PM
    • 229 Posts
    • 126 Thanks
    that
    • #9
    • 27th Mar 18, 4:57 PM
    • #9
    • 27th Mar 18, 4:57 PM
    if you are not progressing with the TV, would suggest you take the power board out, and look for bulging capacitors, and if you can't find any, check the other boards out too.

    Google is sort of a friend, and from the bottom up...
    https://archive.org/details/Panel_LG_Display_LC420WUN-SCA1_0
    the above has to do with the lcd display and indicates expected voltages etc.

    94V-O 0906 hannstar
    lots of polish/eastern european references that say something about computer and have usb pictures ??? Have a look yourself... match the image and possibly win a tv

    Green sticker board, because it say UK, makes me think decoder/ signal processing/logic

    Ariel amp/booster socket?

    The rop one has no references that i can find with a quick search
    Last edited by that; 27-03-2018 at 5:02 PM.
    • mobileron
    • By mobileron 28th Mar 18, 7:02 AM
    • 78 Posts
    • 37 Thanks
    mobileron
    Heres what i did on my LG,put the board in the Oven for 20 mins at 200,let it cool now reinstall,tv works ok now.
    If u dont believe google it and see.
Welcome to our new Forum!

Our aim is to save you money quickly and easily. We hope you like it!

Forum Team Contact us

Live Stats

2,599Posts Today

7,463Users online

Martin's Twitter
  • RT @LaraLewington: ...and mine suggested I'd achieved a lifelong ambition of being sawn in half by a magician - at our wedding. Wasn't. Don?

  • We are working on it - I think BA has behaved awfully on this. Those flight were no obviously a glitch. It should? https://t.co/8pvtXtUEqi

  • RT @thenicolabryant: Absolutely. We need mental health and financial health as advocated my @MartinSLewis , to be taught in schools. So muc?

  • Follow Martin