Sorry for the delay,
The SYNC LED on the OSSC turns on too. 🙁
The Display read the following and changed from time to time;
AV1 : RGsB 0i
then sometimes it would read;
AV1 : RGsB 1335i
AV1 : RGsB 275p
and it did flick between
AV1 : RGsB 562i
and NO SYNC
Sounds works I can hear the PSX boot with no disc in it.
Also the Wii works through the Component.