Mark Best

A firmware upgrade for early models of the Toshiba SV670U is now available.

(Credit:
Sarah Tew/CNET)

When I reviewed the Toshiba SV670U series nearly two months ago, the review was based on the second of two review samples. Let’s call them T1 and T2.

Why the need for a second sample? T1 suffered from a pretty glaring problem in my opinion. In certain scenes, parts of the local dimming LED backlight would flash intermittently and at random. Here’s how I put it in my original draft of the review:

The Toshiba had a propensity to interrupt dark areas with brief flashes of brightness that were confined to small zones on the screen. The instance we noticed first was during the demonstration sequence from “Digital Video Essentials: HD Basics” (around the 2:50 mark).

When the computer-generated plants fade in from black, flashes appeared in the lower left and upper left of the black background as the overall brightness of the scene increased. When watching “Austin Stevens, Snakemaster” on Discovery HD Theater, we saw brighter flashes, akin to blooming, in the darkness around Austin’s head as he leaned toward the light in a cave.

During “Watchmen” the flashes also appeared occasionally and for no reason we could discern. In the initial fight, for example, the lower-left corner flashed briefly just as the Comedian’s blood drips down onto the smiley-face pin. A zoom in to President Nixon created another flash in the lower right. Our guess is that LED elements were lighting when they’re not supposed to.

When we talked to Toshiba about what we saw, the company insisted on sending T2, which didn’t suffer from the flashing issue. We mentioned the problem with T1 in the review, telling readers we’d update the situation when we knew more.

Now we do. …