Mulja tv repair portal
Equipment Repairs => LCD TV forum => Topic started by: LEEDASH on June 18, 2012,17:05:05
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Firstly hello to all,now heres a problem I'm facing,I have a 32 alba LCD 32880 model which has discovered a fault where it only stays on for 5 seconds,then switches off.
We'll I bought a faulty set of eBay which had a broken screen but stayed on longer than the 5 seconds,so by doing a bit of research on here and google,I just changed the power board from the broken screen and hoped for the best,we'll not all,it dont work :( the second set with cracked screen seemed to be a facelift model but
model number is exactly the same,only difference was mine had 2 hdmi ports and this one had only one and a VGA port,but board inside was near identical even down the board number.
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Chassis 17MB25/Vestel
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Thanks for the information
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6870C-0238B LG CONTROL BOARD PCB LC320WXN-SBA1 Is the board at fault,light only stays on for a matter of seconds,know where i can source one at a reasonable rate ?
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Hi
i have one of these in the shed with a cracked screen and no boards i will see if it still has the T-con board still in it tomorrow
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That be good thanks
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hi
i d'nt understand the fault you have,does it go completely off
or just the pic,and why change tcon
dave
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The original problem was the screen only stayed on for a matter of seconds,was told it may be the power board no working properly,ok,so I sourced another tv set which only fault was a smashed screen so I knew the power board was ok,as the set stayed on.
So by swapping the board into the original set it still acted in the same way,the only thing I noticed was the light on the top board would only stay on for a matter of seconds,I was unable to try this board from my donor set as it was different to the original,still a lcd32880hdf but donor set was like a 'facelifted' version,hence why I need to try another board.
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hi
have you checked the inverter board fuse,transformer
dave
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'SPARKY' A ny chance you could draw up a picture and point out the problem you have suggested,thank you.
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hi
post a pic of all the panels in situ will try and show inverter
dave
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Heres some pictures
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The board I was enquiring about is in the last one under the metal cover,only stays on for a matter of seconds,
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put all oridginal boards back in in to set and try disconnecting one side of caps c231/230 if set comes on faulty inerter discharge caps ..i think they are 650nf 5kv..
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hi
if you have changed the power supply and still same prob screen faulty one of
the ccfl tubes the inverter transformer is on the psu
there are some 5pf caps 5kv wkd near plug for screen cause this fault
but would seem strange that the psu you changed is giving same fault
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Yeah tell me about it,the board worked ok in another set,must of been has it stayed on for longer than this one,that's why I thought the top board was at fault ? How can u tell if the top board is working ok at this moment in time only stays on for a matter of seconds
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hi
does the backlites stay on
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No,light on the top board stays on for a matter of seconds that's all
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what top board
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Yes the one under the cover
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do you mean the screen?
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Right looking at the back of the tv set,to the right you have the power board,to the left you have another board with scart,hdmi etc and to the top of the unit you have a small board with ribbon connected to left board and to screen,this is the board with a 'blue' light which light up for a matter of seconds
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sorry cannot help with out seeing tv in real time sorry
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Fair enough,this board (tcon) had got to be the problem though,having googled this set it seems to be a common fault,the board which powers everything seems to be working,as it was working well in my donor set,just seem strange this tcon board don't stay alight.
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hi
never seen tcon that lights up
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When I get a minute il put a picture up,it's only got one led on it,I assume this tcon board stays on to power the screen
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Sparky here's the tcon
http://www.lcd-plasma-parts.co.uk/index.php?route=product/product&product_id=11859
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ye the tcon will not make the screen light up
the screen will light up if tcon disconnected
i think i would not bother speding any more cash
on it unless you get same model in working order
to compere what panels are faulty
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hi guys.
normally when you switch on the tv in 2cnds the t-con board has giving the light on then off,this is normal
if you already changed the inverter and power board they are mention as well probably ccfl problem.
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Tell me more