IBM 393, 387, 391, 389 Working inside the server with the power on, Removing the server cover

•Properly route the cables. For some options, such as PCI cards, follow the cabling instructions that come with the options in addition to the instructions in this manual.

•Make sure that you replace a failing fan within 48 hours.

•When replacing a hot-swap drive, install the new hot-swap drive within two minutes of removal.

Working inside the server with the power on

Attention: Static electricity that is released to internal server components when the server is turned on might cause the server to halt, which might result in the loss of data. To avoid this potential problem, always use an ESD wrist strap or other grounding system when you work inside the server with the power on.

The server supports hot-swap devices and is designed to operate safely while it is turned on and the cover is removed. Follow these guidelines when you work inside the server with the power on:

•Avoid wearing loose-fitting clothing on your forearms. Button long-sleeved shirts before working inside the server; do not wear cuff links while you are working inside the server.

•Do not allow your necktie or scarf to hang inside the server.

•Remove jewelry, such as bracelets, necklaces, rings, and loose-fitting wrist watches.

•Remove items from your shirt pocket, such as pens and pencils. These items might fall into the server as you lean over it.

•Avoid dropping any metallic objects into the server, such as paper clips, hairpins, and screws.

Removing the server cover

Attention: Do not open your server or attempt any repair before reading and understanding the “Safety information” on page iii and “Guidelines” on page 83.

This topic provides instructions on how to remove the server cover.

Before you begin, print all the related instructions or ensure that you can view the PDF version on another computer for reference.

Note: Depending on the model, your server might look slightly different from the illustrations in this topic.

To remove the server cover, do the following:

1.Remove all media from the drives. Then, turn off all attached devices and the server.

2.Disconnect all power cords from electrical outlets.

3.Disconnect the power cord(s), Input/Output (I/O) cables, and all other cables that are connected to the server.

4.Remove any locking device that secures the server cover, such as a padlock or an integrated cable lock. See “Server locks” on page 22.

Chapter 6. Installing, removing, or replacing hardware 85