LG HT355SD - DVD player repair (my first repair attempt)

[MarvinTheMartian]

G'day all,

I'm about to embark on my first attempt at a 'serious repair'. 

We have a DVD player (LG HT355SD) that has been gradually failing in that the sound synchronization is getting out of whack (used to happen if you Pause, then Play and I could fix it by pressing Stop and then Play again).

Last night the 'fix' above no longer works and the synchronization is now always out of whack. 

I've opened the case and done a visual inspection but can see nothing obliviously wrong (there are a ton of electros - Chang brand  ) but none look to be leaking. I've yet to use the ESR meter on any of them.

I next did Dave's "thou shalt test voltages" on the power supply board and the voltages are fine. I haven't tested anywhere else at this stage.

I've got the service manual and am going to see if I can get my head around where this synchronization may be happening, before I test any further. 

This could be a long term project as I learn or ultimately a fail because it is too advanced for me at this stage.

If anyone has some tips or advice, I would appreciate it.

Many thanks.

Edit: Forgot the picture - doh!