Yesterday, Lulea took a 2-0 series lead over Vaxjo, winning 6-2, while Brynas went 2-0 up in their Quarter-Final with Malmo with a 4-2 victory.
Frolunda went down 4-2 to Timra on home ice in the opener, but responded with four goals of their own tonight to run out 4-0 winners.
Two penalties in quick succession for Timra allowed the home side to score from a 5-on-3 after eight minutes through Dominik Egli, and 1-0 was how it stayed until the end of the second period.
However, it took just 15 seconds of the third period for the second goal to arrive and settle the home crowd's nerves in Gothenburg, and again it was Egli who found the net.
Timra took out the goaltender in search of a late route back into the game, but when Frolunda won possession back, Isac Born wrapped up the win in the final two minutes.
There was still time for Egli to complete his hat-trick with another empty-netter in the final seconds, as Frolunda celebrated levelling the series and a 16-save shutout for Lars Johansson.
SCA Arena in Timra will host the next two matches on Tuesday and Thursday, respectively.
Four goals was more than enough for Skelleftea, too, as they beat Farjestad 4-1 away, just two nights after a 6-2 loss on the same rink.
All four goals for the away side arrived in the first 16:23 of the first period, beginning with Andreas Johnsson's deadlock-breaker after three minutes.
Michael Brandsegg-Nygard doubled the advantage at 07:34, before Anton Heikkinen added number three less than 60 seconds of play later, with none of the goals scored on a powerplay.
When Farjestad did have Henrik Bjorklund penalised for tripping, it only took Oscar Lindberg 11 seconds to make the man advantage count.
Marian Studenic pulled one back midway through the third, but it was too little, too late for Farjestad.
Games three and four will be played in Skelleftea, also on Tuesday and Thursday, respectively.
HV 71 on the brink of survival
After just 13 wins in 52 regular season matches and two Playout games, HV 71 have now won three in a row to lead Modo 3-2 in the series to stay in the SHL.
They completed the turnaround with a 4-0 win after a dominant first period display, to secure the first away victory for either side in the series.
Modo suffered a serious setback when Mans Carlsson received a game misconduct penalty for cross-checking in the sixth minute.
Andre Petersson and Jamiro Reber took advantage on the following powerplay, before Oscar Fisker Molgaard shocked the home side further with the third goal in the 11th minute.
The second period was scoreless, before the win was sealed with five minutes to play when William Nilsson found the empty net. Frederik Dichow made 19 saves for HV 71 in his shutout.
The Jonkoping side are now one win away from SHL survival, which they can secure back at Husqvarna Garden on Tuesday.