I need help troubleshooting a non-functioning Sigma bicycle computer BC 506 speedometer, which I understand determines the trip/total miles and trip time. The only item working is the clock.

Google "sigma bc 506 manual" or contact Signma:
SIGMA SPORT

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

Sigma bicycle computers go to sleep after a programmed time.

Check the wires and sensors.

Simple search engines find things like this faster than waiting for Fixya experts to respond.

"sigma 506 manual"

Manuafacturers usually have the manuals. sigmasports.

For identification of the model and/or instructions for it...

http://www.sigmasport.com/en/service_center/produkt_support/bikecomputer/

The dot (".") on the "Total ODO" display is not decimal point, it is thousands (digit grouping) separator. If you want to set e.g. 330.75 km, then you enter "00.331". If you want to set 1145 km, you enter "01.145". The decimal point on this Sigma computer is denoted using decimal comma "," (as used in German and other lagnuages/countries) even if you set the language of the computer to English. You can see decimal comma e.g. in "TRIP DIST" display.

Get the manul...
http://www.sigmasport.com/en/service_center/produkt_support/bikecomputer/

Here is the link to Sigma Sport. They have a good customer service and I would discuss directly with them. That way whatever is determined you cut out several steps and either get the unit replaced or fixed properly with advice that is direct from the source.

This may also be a warranty situation in which case again you will eventually need to go through Sigma Sport.

You have done all the normal things that make sense to diagnosing the problem, sounds more like the problem is internal. One thing to also keep in mind, electronics like this do wear out and sometimes they just start to die off. This may also be the case, but Sigma Sport will be able to tell you.

Good luck

No problem, what it is doing is recording actual pedaling time. Say you go out for a twenty mile ride and take two rest stops. You were gone for lets say from 12:30pm to 3pm, 2.5 hours total, but trip time shows 2hrs10min. If you took two breaks of 10min each, there's the difference. My Bontrager computer counts trip time based off input from the speed sensor, if I'm not moving it doesn't count trip time. I beleive that is what is happening.

Hello there please try thislink and seeif you can find your bicycle there
best regards michael

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