Product type	Where to look
Computers, Printers & Office	Printers usually have the label inside the front access door or on the back. Laptops have it on the underside. Monitors put it on the back panel near the stand.
TVs & Home Theater	The sticker is on the back panel of the TV, often near the ports. Most smart TVs also show the model code in the settings menu under Support or About, which is easier than pulling a mounted TV off the wall.

Getting the official ViewSonic manual

ViewSonic publishes product documentation on viewsonic.com. Search there with the full model number from the label, then look for a documents, manuals or downloads section on the product page.

If your model isn't listed, try removing the last few characters, which usually only indicate color or region. For discontinued models, look for an archive or legacy products section, or contact ViewSonic support directly.