UXBRIDGE, Mass — There is still no definitive answer as to why an Acer laptop malfunctioned and began burning during Massachusetts Comprehensive Assessment System (MCAS) testing in Uxbridge.

"They did say they felt that it was an issue with the lithium-ion battery and that the computer, the laptop, may have been dropped," said Michael Baldassarre, the town's superintendent of schools.

The malfunction led to burns on the hands of an 11-year-old at Whitin Intermediate School.

Baldassarre met with the student and his family following the incident.

"I did see him," Baldassarre said. "I can tell you that his hands are now bandaged and the injuries are very minor, compared to when you look at that and think about what could have happened."

The laptop will now be sent back to Acer for further investigation.

Meantime, identical models of the Acer laptop have been removed from schools.

"About 350," Baldassarre said, when discussing how many laptops they recovered. "So we have all of those now. We have their power cords with them so we can make sure. We can check to make sure the right power cord is with the machine, if that means anything."

MCAS testing resumed for most of the district, but fourth grade through sixth grade will have to wait for new computers later this month.

"Acer is deploying 450 loaner Chromebooks to us," Baldassarre said. "It's a really heavy lift for a district of our size to get those deployed in one day. So, Acer is actually sending out a team of people to assist us with deployment on that day. So our kids will have the loaner devices in their possession for the continuation of the MCAS administration."

Those loaner computers from Acer are expected to arrive April 22.

Fourth, fifth and sixth grades will continue their MCAS testing ahead of the state's deadline to complete the assessments, which is April 26.