My hitachi tv keeps flashing up wifi dongle detected wifi dogle removed how can i stop this

Run a malware or antivirus program. It should not be in the middle of the screen if it was a legitimate program.

call a expert

Dust in the USB socket can cause false indications. Blow out the USB socket and try.

If you don't have a wi-fi dongle inserted, your TV is not working correctly, should takeit to repar

Take it back to the store you bought it from, and ask them to fix it or replace it for you.

without any info,,i;e,,make,model,year,
problem,,WHAT KIND OF ANSWER
DO YOU EXPECT???

The WIFi dongle maybe loose or has lost its settings.

Make sure it has a good line of sight to the router and is not hidden behind the TV.
You can set up the settings manually
.The other thing which may help is to go into TV menus under network and change from 'manual' and use your own details;
Try these settings;
IP - 192.168.1.100
Subnet - 255.255.255.0
Gateway - 192.168.1.1
DNS - 8.8.8.8

Go to the manufactories website to see if there's a firmware for the TV. This could be a common. If there's no update then you could try connecting the TV via ethernet cable. Failing that your best bet would be to contact the place where you bought the TV from if it's still under warranty or contacting the manufacturer.

hi!i have just the same problem,i made a factory reset and it looks like it helped no more flashing message