Hello! My HF3520 suddenly cut out in the middle of the alarm and now is non-responsive. When plugged in, there's no display or response to the buttons. I've left it unplugged for a while, and also plugged it in for a while but nothing happening. I can't believe that it's unfixable and I'd really like to fix it or take it to a repair cafe. Has anyone else had a similar issue? I'm trying to work out if it's most likely to be a chip / bulb/ cable issue. Does anyone know what bulb it takes?