For two long days after his team’s 91-79 loss to the Spurs in Game 1 of the Western Conference playoffs Sunday, Los Angeles Lakers coach Mike D’Antoni hunkered down with his staff to perform the autopsy.

After all the forensics were in, and all needed adjustments debated, D’Antoni came up with the simplest of plans in hopes of evening the series in Game 2 on Wednesday night.

“We’ve got to score points,” D’Antoni said.

The defensive struggle of Game 1 was not the way D’Antoni remembered losing playoff games to the Spurs. After all, his “Seven Seconds or Less” Phoenix teams used to routinely drop games in April and May by pinball scores of 121-114 and 117-115.

It was, however, how the Spurs were once accustomed to winning playoff games under Gregg Popovich.

The 79 points the Spurs surrendered in Game 1 were the fewest they have allowed in the postseason since a 75-72 victory over Cleveland in Game 3 of the 2007 Finals.

For a coach who spent much of the season whipping his team’s defense back toward championship-caliber, only to see much of that work unravel in the final month of the regular season, Sunday was an encouraging sign.

“I thought it was the best defense we’ve played in three or four weeks,” Popovich said. “It came at a good time.”

The trick, heading into Game 2, is for the Spurs to repeat it.

Of all the adjustments D’Antoni might make, the one that would help the most — All-Star guard Kobe Bryant walking through the AT&T Center door — isn’t going to happen.

With Bryant’s contributions confined to Twitter — he’s out for the playoffs with a torn left Achilles tendon — the Lakers’ offense now runs inexorably through big men Pau Gasol and Dwight Howard.

The pair combined for 36 points and 31 rebounds in Game 1, but apart from that, L.A. didn’t have nearly enough firepower to outscore a Spurs team that shot 37.6 percent.

Eighteen turnovers — made possible by a dozen Spurs steals — didn’t help.

“The most important thing is not to get overboard on (tweaks),” L.A. forward Antawn Jamison said. “We got quality looks. We just couldn’t get them to convert.”