MINNEAPOLIS – The disarray at Best Buy headquarters hit a crescendo last week with the surprise resignation of company chairman and founder Dick Schulze.

But his succession at next month’s annual meeting by board member Hatim Tyabji, for failing to disclose a relationship between former CEO Brian Dunn and a subordinate, could help usher in a new era for the No. 1 CE chain as it struggles to find its place in a changing retail landscape.

NEW YORK – Six leading national retailers all reported net profits in the first quarter – although some were lower than the prior year and Sears was in the black based on the sale of some operations.

Wal-Mart Stores reported net sales for the first quarter, ended April 30, were $112.3 billion, an increase of 8.6 percent from $103.4 billion in the first quarter last year. Consolidated net income for the quarter was $3.7 billion, up 9.2 percent from the first quarter last year.

New York - Samsung's parent company may have let the cat out of the bag on the launch of three NX-family mirrorless interchangeable-lens cameras a couple of weeks ago, but the U.S. sales and marketing team pulled out all the stops to give the NX20, NX210 and NX1000 a proper retail send-off Thursday.

Chicago - Regional carrier U.S. Cellular plans May 21 availability of its first 4G mobile hot spot, the 4G LTE Samsung SCH-LC11 mobile hot spot.

The limited-time price is $49 after $50 mail-in rebate and two-year data-service contract.

It will be available through the carrier's stores and indirect agents in the carrier's current LTE markets and in markets launching LTE by year's end, when 54 percent of the population within U.S. Cellular's footprint will be able to access 4G service. The device is already available on uscellular.com.

Washington - Dish Network presented its case to the government that it should be able to repurpose its 2GHz satellite spectrum for terrestrial wireless broadband, but the satellite-TV provider asked the Federal Communications Commission (FCC) in a filing to relax its proposed rollout schedule.

Los Angeles, Calif. - Massive Audio plans a second wave of six more OEM-replacement car audio speakers in the early summer to follow the recent shipment of six models.

The speakers, all in the DX series, are sensitive enough to be powered by the built-in amplifiers of factory head units, the company said.

Massive recently shipped the coaxial DX 4, DX 5, DX6, DX46 and DX 57 and a three- way 6x9. They'll be followed in early summer by the DX2, DX3, DX65 and shallow-mount DX6S, DX69S and DK6 component speaker.

Prices weren't available.

Newport Beach, Calif.-THE Home Entertainment Show 2012 has scheduled three days of seminars to go with its high-end A/V exhibits.

Topics range from the science of audio and interpreting speaker measurements to turntable setup tips, high-resolution music downloads and new speaker designs.

She has been with the company since 1997.

El Segundo, Calif. - DirecTV said Thursday it will soon offer broadband service bundles with its subscription TV services to subscribers across the country, through new deals reached with satellite next-generation broadband service providers ViaSat and Hughes.

DirecTV will offer the ViaSat's Exede by Hughes' HughesNet Gen4 satellite broadband services, both of which provide speeds of more than 10Mbps.

New York - Manhattan retailer DataVision hosted the official coming out party for Samsung Series 7 Gamer laptop.