On 16.08.17 13:34 , berendnie@... [tr-707] wrote:

Hi Florian,

Thanks allot! i will give it a go  immediately. So what you are implying is that there is a possible failed cap somewhere along the board instead of the -10v dc dc converter part

My main argument is: separate the power supply from the rest to find out, whether the problem lies in the supply circuit itself, or whether the problem is caused in the other circuits. If the problem is not in the supply itself, then a failed cap is a possible cause. But a short in a IC is possible too.

Should i also check C7

I don't think it is a tantalum cap. They are quite easy to recognize: the look like a plastic drop, usually yellow or orange, sometimes blue.

Florian