Question about Sanyo DP46849 46 in. HDTV
Unless the loss of picture was a result of a firmware upgrade on the TV, from a USB stick? then It would be a hardware problem, if the issue came up after a firmware update, then the update may have failed and it would need to be re-done.
IF the tv went out on its own the issue is most likely internal hardware, possibly the power board, but can't say for certainty what the issue will be.
It is sad that in our current money driven system/economy, manufacturers will and can not produce products that would be made to last longer than a year or two, we do have the technology to create such high quality products that would last a decade without repairs, but it will not happen in this money driven system where the products must eventually (possibly right at the end of the warranty) fail in order to keep money in circulation and the manufacturers in business.
Posted on May 13, 2010
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Posted on Jan 02, 2017
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In most cases the standby light might blink with different rapidity to indicate a fault relevant to the processor. It is possible that most of these indicate that there are errors in the processing section . Since there is a possible short or leak in the circuit the output driver section can take in huge current to trip the SMPS or from advice from the micro processor. Remove the power plugs and make sure that high voltage sections are discharged of the potential stored in capacitors. Look for visible signs of leak or of busted capacitors. Look for bulged capacitors or damaged components- burnt or busted. Use a multimeter to check the continuity or shorting in components, if so detach from circuit and test . If the voltage builds up and the set power ON and then shuts up then the suspected section must be checked in detail.
The processor must have the +5 voltage to the function properly , the +B and secondary voltages also must be checked to infer the fault. Trace with caution and in running through the signal path , circuit trail.
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