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## 2.3 Performing Electrostatic Discharge and Static Prevention Measures

Electrostatic discharge (ESD) sensitive devices, such as the PCIe cards, hard drives, CPUs, and memory cards, require special handling.

| Caution - Circuit boards and hard drives contain electronic components that are extremely sensitive to static electricity. Ordinary amounts of static electricity from clothing or the work environment can destroy the components located on these boards. Do not touch the components along their connector edges.

| Caution - You must disconnect AC power cords to both power supplies before servicing some of the components documented in this guide.

### 2.3.1 Using an Antistatic Wrist Strap

Wear an antistatic wrist strap when handling components such as disk drive assemblies, circuit boards, or PCIe cards. When servicing or removing server components, attach an antistatic strap to your wrist and then to a metal area on the chassis. Following this practice equalizes the electrical potentials between you and the server.

Note - An antistatic wrist strap is not shipped with the servers. However, antistatic wrist straps are included with customer-replaceable units (CRUs), field-replaceable units (FRUs) and optional components.

### 2.3.2 Using an Antistatic Mat

Place ESD-sensitive components such as printed circuit boards on an antistatic mat. You can use the following items as antistatic mats:

- Antistatic bag used to wrap a replacement part

- ESD mat, part number 250-1088

- A disposable ESD mat (shipped with some optional system components)

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