For on-site help
Your general area, the devices involved, and whether the problem affects one machine or the whole setup.
On-site service request
Tell me what needs help at home or work.
Send the devices involved, the problem, and your general area. Repair, upgrade, laptop, and custom-build requests are welcome too.
Service request
Before you send
Useful, not mandatory.
Do not worry about collecting everything below. It simply helps narrow down the job faster when you already have it.
For a repair
What happened, when it started, any error message, and whether the problem is consistent or intermittent.
For a build
Your budget, the games or software you use, any parts you already own, and what matters most to you.