IIRC the list of laptops in he 486-range that actually had integrated audio is very very short. There is a reason why Serdaco's newly made LPT sound devices are enjoying such high popularity.
Sound devices didn't appear to be among the normal loadout until early Pentium-based laptops, which then made use of chips alike ESS and Yamaha.
WRT colour monitors... around that time laptops made the jump from monochrome to colour, albeit mostly by utilizing DTSN screens that are not good for gaming due to their immense ghosting.
Early Pentium-based laptops were again among the first machines to utilize TFT instead of DTSN.
"Dual Scan, also known as dual-scan supertwist nematic or DSTN, is an LCD technology in which a screen is divided into two sections which are simultaneously refreshed giving faster refresh rate than traditional passive matrix screens. It is an improved form of supertwist nematic display that offers low power consumption but inferior sharpness and brightness compared to TFT screens. For several years (early 1990s to early 2000s), TFT screens were only found in high-end laptops due to them being more expensive and lower-end laptops offering DSTN screens only. This was at a time when the screen was often the most expensive component of laptops. The price difference between a laptop with DSTN and one with TFT could easily be $400 or more. However, TFT gradually became cheaper and has essentially captured the entire market.
DSTN display quality is poor compared to TFT, with visible noise, smearing, much lower contrast and slow response. Such screens are unsuitable for viewing movies. " [Wikipedia] (...or playing games, for that matter)
Compaq Contura 400 comes to mind, wrt colour display..... Again, this is DTSN. But this laptop doesnt have sound integrated. It's a prime example of how the normal laptop loadout looked these days.