Hi Arto,
There should be an email response to your helpdesk inquiry about the transformer. If you didn't receive it, please let me know and I will resend it.
Jorge,
There's no charge to test the DS5 and see what's wrong with it. It's likely either the transformer or the thermal protector. The transformer is $65 installed, and the thermal protector is $35 installed. Email me if you're going to send it in and we'll get the bench time scheduled in advance for the fasted turnaround.