Yup, don't hesitate to ask for help when you need it. Don't waste time spinning your wheels fruitlessly. If you are worried that you are asking for help too early (i.e. before you have explored the problem to the best of your abilities), then try writing an email (or something similar). I find it to be a useful way to anticipate the questions that others will ask ("Oh, have you tried X yet?", "Have you tried turning it off & on again?"). If you can't answer any of the extra questions that you come up with composing your email, then it's probably a good time to ask for help.