I think I've narrowed it down to bad media. I installed my LG burner as a second drive on my desktop, the one I burned with for the last two years, and promptly burned the disc again. And again, it doesn't play in the laptop ("no disc"), but does in the desktop and PS3. However, all the discs I've burnt before this new pc work on the laptop, which means I have some iffy media in this batch of discs, or there's something wrong with my dvd shrink/ImgBrn settings. It seems my custom settings in dvd shrink for disc size(4464) don't save and it keeps resorting back to DVD 5 4.7. Yet when I load the burned disc into Dvdshrink, it is all green, and good to go at 100% at 4464.
That's all I'm left with, so I ordered me some Verbatim discs.
Thanks for the help.