I'm certainly no expert but is sounds like it could be a hardware problem rather than software. Either way I doubt you'll find the solution at home. If you haven't got anywhere by tomorrow morning contact either of the following in the morning. Both are in Kalyves, know what they're doing, are helpful and speak good English [if that's necessary].
Theo at X-file 28250 31561 / 69880 17474
Spiros at Media Planet 28250 31161
As you come down the hill into Kalyves [from Almyrida/Vamos direction] X-file is on the left about 80m before the main junction at the bottom of the hill. Media Planet is about 50m further, on the right.