Airbag

Hi All I have a Lexus IS250 SEL 2005 With the upgraded sound system. The screen has started to play up. It works fine sometime for days and sometime it keeps on resetting every 2 mins. The power consumption screen comes up sometimes like it is a hybrid. Sometime the screen will go a funny colour or have lines all over it. It will turn the radio off and then it all comes back to normal. I have read a few posts suggesting certain cards that may need to be swapped. Can anyone tell me if I replace it will all the problems go and has nothing to do with the battery or alternator. If anyone has a unit PM me Thanks