After a lot of searching, I haven't seen anybody with the same issue.
Issue ('03 Boxster S):
OBC display disappears / appears / blinking (on/off) and after a while the display is totally black (off). The whole issue is random. Sometimes everything seems to be normal. It is really frustrating.
I think it is such a power issue, but where should I start with troubleshooting?
-Connectors behind the instrument cluster?
-Fuses / relays? (which one?)
-Or other options?
Thanks in advance
Sander