My Pure Tempus-1 DAB/Alarm Clock has given me good service for several years. Then, while I was listening to a radio station on it, it suddenly made a short squawking noise for a couple of seconds and then fell silent. So now, it shows the LCD back-light but nothing on the LCD display and no sound.
I took the thing apart and saw a couple of regulators and measured 3.3V on the output of one and 5V on the other, so it looks like the power supplies are still working. I had a look around the boards and noticed a crystal oscillator and this was producing the correct output. There is one small square BGA chip and I tried pushing down on that while cycling the power, but this didn't do anything. Probing around all the electrolytics, they all seem to have believable voltages across them. The AF amp also seems to be operational.
Trouble is, I can't see anywhere on the web to get a schematic, so I'm working in the dark with this. Does anyone have any suggestions on stock faults or source of a schematic?