Wii the colour keeps going black and white when we switch it on somethimes

Try using a different channel, 3 is generally the channel for video players and video games, 2 will also work sometimes 4.

please check your cables and make sure that they are on the right ports. simple solution. nothing wrong with your wii. New Tv can be a little confusing. remember just keep your wii on and test the ports till you get the right ones. If other devices are working such as dvd player then you need to replace the cables

hello,
the problem could be from the colour setting of the television on the AV .
Go to menu on the remote to change the colour function from NTSC to AUTO.
Good luck

our wii turned black and white, and i fixed it by switching my AV onto AV1 setting, somehow it had gone on to AV25 and this had turned it black and white, so check out your AV menu options on your tele

This is because UK wii's use a PAL signal for video display. If your TV does not support the signal, it's always going to be black and white. You might need to try a different TV.

Check if the tv has different types of AV settings, as this affects whether the wii plays in black and white or colour.

Try plugging it into another scart socket, this sometimes happens when a tv does not support 60hz. the result is a screen that has no colour. You could try just plugging it onto the seperate av inputs. Most tv's these days have one scart that will work ok and in colour.

mabey its on the wrong av channel cause on my tv it has 1 in colour and 1 in black n white or change the scarts around

check you've got it on the right PAL/NTSC setting.It's very likely the 50/60hz setting. 480i running at 60hz is NTSC resolution although the PAL Wii of course uses the PAL signal. The TV probably tries to interpret the signal as a real NTSC signal because it's 480i 60hz and thus can't handle the colors. There has got to be an option to switch between NTSC and PAL.
Are you using the same SCART socket that you use for your other consoles or a different one? My SCART3 input on my Panasonic telly has two different modes - one which displays in colour, and one which displays in a sort of grainy black n' white. There is a purpose to it but I can't remember what it is. :-)

Anyway, you switch between the two by pushing the AV button and then hitting the colour button which corresponds to SCART3 a few times 'til you reach the correct setting.

It probably isn't that, but... y'know. Sanity check.

I bought a wii a few days ago and like everybody else mine too was in black and white with a grainy picture. I have a Panasonic lcd flat screen and thought I had connected it corrected, I got somebody out to have a look at it and found out there are some connections on the side of the TV which I hadn't even noticed before, once I put the red white and yellow leads in these and set the TV to AV3 everything is in perfect colour. Hope this works for some of you.