Intermittent problems

vFollow the suggested actions in the order in which they are listed in the Action column until the problem is solved.

vSee the parts listing in the Problem Determination and Service Guide to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU).

vIf an action step is preceded by “(Trained service technician only),” that step must be performed only by a trained service technician.

Symptom

Action

 

 

A problem occurs only

1. Make sure that:

occasionally and is difficult to

v All cables and cords are connected securely to the rear of the server and

diagnose.

attached devices.

 

 

v When the server is turned on, air is flowing from the fan grille. If there is no

 

airflow, the fan is not working. This can cause the server to overheat and

 

shut down.

 

2. Check the system-error logs (see “Using the Configuration/Setup Utility

 

program” on page 26).

 

If the problem remains, call for service.

 

 

Keyboard, mouse, or pointing-device problems

vFollow the suggested actions in the order in which they are listed in the Action column until the problem is solved.

vSee the parts listing in the Problem Determination and Service Guide to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU).

vIf an action step is preceded by “(Trained service technician only),” that step must be performed only by a trained service technician.

Symptom

Action

All or some keys on the

1. If the server is attached to a KVM switch, bypass the KVM switch to eliminate it

keyboard do not work.

as a possible cause of the problem: connect the keyboard cable directly to the

 

 

correct connector on the rear of the server.

2.If you have installed a USB keyboard, run the Configuration/Setup Utility program and enable keyboardless operation to prevent the POST error message 301 from being displayed during startup.

3.If you are using a USB hub, disconnect the USB device from the hub and connect it directly to the server.

4.Make sure that:

v The keyboard cable is securely connected to the server and the keyboard and mouse cables are not reversed.

v The server and the monitor are turned on.

5.Reseat the keyboard cable.

6.Replace the following components one at a time, in the order shown, restarting the server each time:

a.Keyboard

b.(Trained service technician only) System board

Chapter 5. Solving problems 39

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IBM 4364, 4365 manual Intermittent problems, Keyboard, mouse, or pointing-device problems
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4364, 4365 specifications

The IBM 4365 and 4364 are significant models in IBM’s lineup of mainframe computers, designed primarily for large organizations requiring robust processing capabilities. These models emerged during the late 1980s and early 1990s, serving to enhance the performance and versatility of business computing environments.

The IBM 4365, launched in 1985, is known for its sophisticated architecture and large processing power, capable of managing substantial transaction volumes. It features the advanced Multiple Virtual Storage (MVS) operating system, which allows for efficient processing and management of numerous tasks simultaneously. The MVS system contributes to high reliability and availability, factors paramount for businesses that rely on uninterrupted service.

One of the standout characteristics of the IBM 4365 is its ability to scale. Users could configure the system with multiple processors, allowing it to handle increasing workloads effectively. This scalability is made possible through its use of IBM's proprietary technology, which optimizes resource allocation to improve efficiency. The system could support an impressive number of users, making it ideal for large enterprises.

In contrast, the IBM 4364, released slightly later, is a more modest version aimed at smaller organizations but still renowned for its reliable performance. It too operates the MVS operating system, but its configurations are tailored for less intensive processing needs. It is designed with cost-effectiveness in mind, making it suitable for businesses that require robust computing without the extensive capabilities of larger systems.

Both models benefit from IBM's robust security features, ensuring data protection and compliance with industry standards. Additionally, they offer significant storage options, utilizing IBM's innovative storage technologies to retain vast amounts of data efficiently.

Among the key technologies that defined these mainframes were the use of advanced input/output capabilities and compatibility with a broad range of peripheral devices. This integration allowed organizations to enhance productivity while maintaining seamless operations across various applications.

Overall, the IBM 4365 and 4364 exemplify the evolution of mainframe technology during their era, offering remarkable processing power, superior reliability, and scalability while paving the way for future innovations in enterprise computing. Their legacy remains influential in shaping the landscape of business technology today, as organizations continue to rely on mainframe processing for critical operations.
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