Philips CD 204 needs help

[dubai2000]

Enjoying the sound of my slightly modded 104, I decided to get a 204 as well. The unit arrived and I started replacing electrolytes, doing the NOS mod and replacing op-amps. I had done this before in the 104 and didn't expect a lot of trouble. But far from it:

Problem one: while the unit was playing I got some distortion when things got musically complex and loud. I checked all soldering joints but to no avail..... So any suggestion will be welcome.

Problem two: after my last soldering operation the player doesn't power up properly. All it does is that the transport starts spinning, but that's all - no display, no reaction to any button.... .
So now am feel kind of lost and need some suggestions where to go from here?
Thanks in advance for any helping feedback.

Greetings from autumnal Germany,
Wolfram