Virus Ti no sound from output
 

Hi I bought a Virus TI in 2008, now my keyboard is giving some problems. When
I turn it on, it makes no sound (from all the outputs, also from the
phones output)

After trying to turn on and off several times (for 5-10 minutes...),
Virus starts playing normally without interrupting anymore.

The guys from synthesizer service in Germany tell me that there’s no way to resolve the problem, but they can only replace the motherboard for 480€!

What do you think? is there another to resolve this problem?

Thank you