This will not help OP's case but if anyone reading this ever come across a case of damage, and especially in cases of concealed damage (e.g., box looks fine but contents is damaged), your first step is to call the delivering terminal immediately and ask to speak with someone in OS&D (short for Overages, Shortages & Damages). Their primary job is to take notes of your case and, if needed, advise you on what to do next. The faster you notify OS&D, the stronger your case will be when filing a claim. Get the person's name, email address (to send pics, verify things in writing, etc.), and keep notes of when you spoke to him or her.
Although this action is not nearly as good as signing the POD (proof of delivery or delivery receipt) with noted damages, notifying OS&D as soon as you can is truly the next best thing.
And never be afraid to sign the POD noting even the slightest scratches. These drivers are used to it. Some warehouses we work with will do just that to protect themselves from liability.
What drivers do hate is when you take too much of their time. But don't let that bother you and it's their problem, not yours. It's your money and your machine, so look over it carefully. Just don't go too crazy. For a small shipment like this, they normally allot around 20 minutes of free time. Plenty of time for you to inspect the packaging for forklift holes, any sign that the box was dropped, etc.