I am looking at an LN-R268w, chassis RE26UO that I received in a
wholesale lot.
Problem is it will have intermittent audio and tuner. It seems to
happen more after warm up. It seem logical to think a common voltage
could be an issue.

You can power it off than back on and it may be fine or switch to no
audio. The first time I powered it on it had no audio, than after
setting the power on/off chime to on audio worked.

I cannot found a bad connection and tapping or flexing main board has
no effect.
Does anybody know if this could be a firmware issue. Manufacture date
is Oct 2005, is it possible to get samsung wty without a proof of
purchase.
Thanks,
Karl K