如果要贴近原句，我认为“思路”即思考路线，可采用Line of thinking，“看问题”可用analyze the problem，其实“看”应该包含分析，虽还没有达到解决问题。
换种思路看问题
use another line of thinking to analyze the problem
或
change the line of thinking in analyzing the problem
有时候还可以用line of thought如：
change to another line of thought on this problem
不过line of thought较多用于形容思想路线，而非思考路线。
如果只是要取其意，以上各位列出的大致上都可用。
如果要意译,可取:
change the method of problem analysis或
apply a different method for problem analysis
