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TEVION 42" LCD LCD4203ID - NO PICTURE

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rebel-mc:
Hi All,
Could anyone offer some advice.  I have a 42" Tevion LCD4203ID with no picture.  Switch it on screen backlight comes on, sound works but no picture.

Any ideas?

Cheers

taloola:
what make of boards and model has this set got

rebel-mc:
Hi, anyone got any idea's?  I have now 3x tevion 42" 2x technika 26" and 1 x technosonic 32" all with the same problems.  All will not come out of standby.  If you remove the connection on the mainboard from either the button panel or IR board the tv will come out of standby and be okay, but if you switch off the tv and leave it for a while it's back to being stuck in standby.
Most of the caps have been replaced on the mainboard and still no diff. 
I have one other mainboard ( as previous message) that comes out of standby everytime but won't display a picture.

I really am totally at the end.  Any advice would be a help.
All of the tv's are from the Siemssen factory DY51LW.  I am willing to send them away for repair if req.
Mulja, Ohm supplies, TV-Tony anychance of your advice.

Thanks

tv tony:
hello again, seimmsen unfortunately bit the dust last year, so i read, ill try and sort diagrams out, best regards tony

tv tony:
what model is your 32 technosonic

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