My grandparents recently replaced their TVs with a Bravia 40" EX700 and a 32" EX400. As they only use the Sky remote (to avoid errors between the sofa and the screen), the volume is set to 50% on the TV. This was all good on their old TVs (older Bravias), but on their new TVs there is a "SONY" splash screen, along with a chime-ish sound that is very, very loud.
Is there any way to get rid of the sound? I would look in the manual, but it turns out paper (or even online PDF) manuals are a thing of the past.