Thank you! I will have a go with that tomorrow when I have my USB cable with me.
Interesting development though. after the person above wrote about it possibly being a battery problem, I took the new battery out and tried the phone with the old one. Would you believe it the phone started as normal?! I could not believe it! It worked for about 24 hours, then earlier this afternoon the screen started going and staying white again and then flashing white and then flashing my normal background screen, then flashing white.etc.etc. which is making me think that this must be a software problem. But why would replacing the new battery with the old one like I did yesterday, make the phone work perfectly (for 24 hours) again?