SVCD on Marantz DV 4100 sound problem...

[jnms]

On SVCD's I am getting jumping sound. Every so often the sound just drops out for a moment and the comes back. This can happen just once...or a load of times in a short period. Anyone else get this?

I think it maybe something to do with the authoring of my SVCD's. However, I would first like to determine if anyone else has troubles like this on this player?

[Tomik]

I havn't those problems with SVCD.

But I have other:
The version of the firmware that is currently installed on my Marantz DV4100 is PHILIPS 9.28. I can’t return it back to the original PHILIPS 7.22 firmware, or something that show normal numbers/letters on the display and allow to use all the functions. Any help much appreciated.