On Mar 22, 6:46*am, Bob Dobbs wrote:
wrote:
On Mar 21, 9:57 am, dave wrote:
On 03/20/2011 09:06 PM, OnkyoMan wrote:

Yesterday, I left the radio out in my 40F degree garage for about 9
hours, then turned it on, while I was out there with it.

No difference in radio behavior... FM came in strong for 2 mins, then
disappeared. AM was completely dead.

Do you still think it could be thermal related?

I don't think you can find a fault that way. A cold solder joint or a
faulty component would be very localized. The current flows through some
abnormally high resistance and heats that area enough to deform it
relative to surrounding areas. If you freeze the whole thing, nothing
changes.

The original symptom was stated as : A) works for a few seconds *B)
reception turns to Noise (and no audio) on all bands . When left in a
cold garage at 40* for 9 hours FM started to work for Whole Two
minutes ! *Thermal as thermal can be .

Can you scan the board with one of those hand held IR thermometers
to look for hot spots? I've got a Fluke 62 that was inexpensive and gives
accurate no-touch readings.http://bit.ly/f8vdQe
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If the trouble is 'thermal' it may just cause an open/erratic
operation . There is really not much there to get warm/hot , except a
voltage regulator or an audio output device .