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Broken Tv Ir input

 
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imaginieus
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PostPosted: Tue Nov 03, 2009 11:48 pm    Post subject: Broken Tv Ir input Reply with quote

I cannot get the ir input on the tv to work. The tv was used and did not come with a remote. I tried a universal remote, the original remote, a new ir assy board, and nothing seems to work.

Does anyone know what could be wrong with it?
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jts1957



Joined: 24 Nov 2008
Posts: 2472
Location: Far, Far Away

PostPosted: Wed Nov 04, 2009 12:41 am    Post subject: Reply with quote

Missing a power source, bad solder joint(s), cracked P.C. board trace(s), open resistor (or other part), shorted capacitor (or other part) or bad IC in system control area. Remote function turned to "off" in a secondary menu (Hospitality TV's for example). Think that should cover most remaining possibilities. Wink
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torbjorn



Joined: 07 Jun 2007
Posts: 370
Location: Sweden

PostPosted: Wed Nov 04, 2009 2:41 pm    Post subject: Reply with quote

Another possibility is a faulty crystal or resonator for the tv's microcontroller. If its clock oscillator runs far off from the correct frequency, the software cannot decode the data from the IR receiver.

Check with a scope or a frequency counter with a low capacitance probe that you get a clean oscillation at about the correct frequency on both terminals of the crystal.
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