Been looking to see if this is a problem experienced elsewhere so far without luck. 07 X5 4.4.

Started up Friday morning (it did start), and a "SOS" appeared in the dash warning screen with a line through it, looked over at the main display and it was black. Further checking showed radio out, phone, display dark, car running. I think the "no SOS" was telling me that the BMW Assist was out, it didn't seem to notice everythying was out.

Was late for an appointment so I drove anyway. Figured maybe a fuse was blown and would check later.

After about 5 minutes, maybe 10, just suddenly everything comes on - display lights, map shows my home for a few minutes then centers, radio comes blaring on. No errors shown on the service displays.

Since then working fine.

Any similar issues? Advice? I hate to take it to the dealer when it is now working, that's just a wasted day.