Can any one help me to upgrade soft on Escort 8500 (x50?)

[dishplayer7200]

I have Old Excort 8500 then i gave it to friend to upgrade he said that he upgrades to next one (8500 X50?) may be it was working good.

But now it's not working

I stop using for about 6 mo to 1 year.
How can i check to see if radar is still ok up to date.
or i need to upgrade software?

What hardware do i need to upgrade radar.

[730i]

Hold down the dim / mode / mute buttons when powering on it will display the software version & reset the unit. most current is rev 6.3

[fire65]

I would try the full reset as stated and see what happens. Or for 60 dollars you can have peace of mind and send it to Escort. I sent my X50 in and got new antenna, new smart cord, new cups, well worth it to me. Nothing worse than wondering if it is working properly, so you never really trust it.