50hdx82 video "shaking"

I just got a 50hdx82 from craigslist, and it needs help. I've posted a
short video here of what it looks like, because I'm not even sure I can
accurately describe it:

http://www.youtube.com/watch?v=mocPfSGvHMw

Basically,
the screen seems to shake from left to right so bad that you can't see
the picture. When I first turned it on, the picture and the menu were unreadable, but after the tv warmed up, the
menu became readable, and the screen is what you see in the youtube video. I did try
the touchfocus, and the horizontal lines are clear (and drift
downward), where the vertical lines are very squiggly (and drift left).

I appreciate any advice, and any
pointers to sites that have pictures or directions on how to fix this
particular problem. I'll definitely try a DIY fix if I have enough information to walk me through the fix (like this one I found on a different topic- it is very thorough-
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html)

I've been searching the web and it appears that the warm-up effect may be the Hyper-board aka DIGI-CONV BOARD. I have the service bulletin that identifies the surface-mount capacitors that need to be replaced, but I have a newbie question- if I buy some 16v 10uf surface-mount capacitors,
how critical is the sizing? I found a link to one source
here:www.mcmelectronics.com but shipping is steep- I'd expect a few
lightweight capacitors to come USPS for maybe $3-4 tops. I
also found some 16v 10uf surface mount capacitors on ebay much cheaper, but those are 3mmx
5.3mm. I haven't found any cheap shipping 4mm ones yet. I assume I should only replace with 4mm? I'll probablyfind a local electronics shop or maybe a grad student in a local electrical engineering program to do the actual capacitor replacement, since that seems like an advanced skill.

One additional question- should I get the full service
repair manual? Does it have other useful info in it?

Thank you,

Keith