I am a maintenance guy, so I may be at an advantage. For these minor annoyances the following will usually work:
This is Ink in room 007. I have a problem with my _________. It ____________. I can fix it. I have some tools with me. I just need to know where the closest Lowe's or Home Depot is so that I can get any parts I might need.
Someone will knock on your door in under 10 minutes.
Then again, sometimes I just fix them. Should I send a bill?