Does anyone service digital pianos in Doha

Hi. I have a Kurzwiel RE210 digital piano. Today a number of keys developed a 'soft' sound and in fact also many do not sound on the first strike. There are no specific keys that this applies to, it appears to be random each time I run up or down the key board. Some are soft, some are ok, some dont sound. Different every time. A chip problem?? or circuit board? This just happened today....everything was fine yesterday...dont think we have had any power surges.
I am living in Doha and transported my digital here from Oman about 5 months ago by sea freight. A short journey but in transit it probably suffered a bit of heat stress, and maybe a knock, despite being well packed and stashed safely in my car on the journey.
Is this a common problem with a straightforward solution?
Whatever... the hard part will be finding a techy in Doha who can help.
Any light on the subject, directions to a good music store who do servicing would be appreciated.