If that didnt work, there is a problem with the battery. On mine initially i use to get hardware failure and detach issues. I realise the the keyboard battery was the only one working. After a while the battery was completely depleted, whilst the clipboard battery never get fully charged.
my observation is that there is a hardware/software issue. Ive tried everything in the book. I recently sent mine to where i purchased it, i took an insurance policy when i got mine. Hopefully ill get a replacement