Glad this is sorted. Was going to say ours occasionally goes blank after charging - no amount of button pressing will sort it - you just have to leave it a day and seems to start working again. It's only done it 3-4 times in over 2 years though and it does get used daily by me and my partner so not complaining - on the whole this one and the previous one have done really well. I strap it to the bars on my bike so it's had many a good soaking and been frozen and it still works.
