Which step is crucial to take to prevent static discharge when servicing HP computers?

Grounding yourself is essential in preventing static discharge when servicing HP computers. Static electricity can build up on your body and can discharge onto the sensitive electronic components of the computer, potentially causing damage to those parts. By grounding yourself, you create a safe path for any built-up static electricity to dissipate, reducing the risk of an electrostatic discharge (ESD) incident.

Methods of grounding can include wearing an anti-static wrist strap that connects to the ground or regularly touching a grounded metal object. This practice ensures you remain at the same electrical potential as the computer's components, decreasing the likelihood of ESD damage during maintenance or repairs.

While the other options such as using anti-static mats can provide additional layers of protection, grounding yourself directly addresses the immediate risk posed by static electricity generated from your body.