I also have a 8500 passport that flashes laser and will go off

Try Manualsonline.com

Hello!!

Hold all three buttons down and reset it.hope it fixes the problem!!

Regards
Smilemaker

it means that something on the main board went out call escort or return it if its new. and underwarrenty otherwise you will have to buy a new one. sorry for the bad news.

sorry but the unit will need to be returned for service - check with Escort to be sure.

The internal diagnostics have detected a problem with the detector. You should contact Escort Customer Service directly for assistance, below:

http://www.escortradar.com/customer-service.php

Power off the RD using its power button. Then hold down the two programming buttons and press the power button while holding down these the two programming buttons. Release all three buttons once RESET is displayed on the RD's display. Your 8500 has now been reset back to the original factory settings with all bands enabled. You can download a PDF duplicate of the original user manual from Escort's web site.

This is caused from voltage fluctuation. Your car will draw down power from the radar detector and it goes off. Passport/escort need to come out with an inline voltage conditioner. Maybe soon.

have you tried it in another vehicle? are you near an airport? has it done it from day one or recently started doing this?

Although the detector could have internal problems, it is possible that it is coming from a real source.
A route I took between home and business triggered mine along the same stretch every time I passed it and after looking a a map and comparing it with the stretch I drove, I found that the Marine airbase at Miramar California was visible (line-of-sight) between two mountains only along that stretch.

Note if the falsing happens at about the same point each time.
I just learned to ignore the laser alarm if it triggered during that 1-2 mile 'window.'

Got to the bottom of my false alarming situation. I finally called Escort and discussed the behavior with the technician who immediately concluded the antenna was failling and needed a repair. $30 worth of shipping and about a week later I got my repaired unit back and it works perfectly. Not sure the root cause but I am going to treat it as gently as possible and hope it keeps working, I sure like it better than the V1.