Memory module problems

Follow the suggested actions for the corresponding symptom in the order in which they are listed until the problem is solved. If none of these actions solve the problem, see “Troubleshooting procedure” on page 171 for the subsequent steps you should check after using the information in this topic. If the problem cannot be solved by yourself, seek technical assistance. See Chapter 9 “Getting information, help, and service” on page 213.

Notes:

1.If you are instructed to remove, install, or replace any CRUs, refer to the related procedure in Chapter 6 “Installing, removing, or replacing hardware” on page 83.

2.If an action step is preceded by “(Trained service technician only),” this action step is reserved for a trained service technician and must be performed only by a trained service technician.

Symptom		Action

The amount of system memory that is displayed is less	1. Make sure that:
than the total capacity of the installed physical memory		• All memory modules are the correct type
modules and you suspect a memory module problem.		• All memory modules are the correct type
modules and you suspect a memory module problem.		supported by the server. See “Features” on page
		supported by the server. See “Features” on page
		7.
		• You follow the memory module installation rules.
		See “Memory module installation rules” on page
		90.
		• All memory modules are seated correctly and
		securely.
		• The system firmware is up-to-date.
	2.	Run any diagnostic programs to test the memory
		modules.
	3.	Reinstall the memory modules.
	4.	Replace the suspect memory modules.
	5.	(Trained service technician only) Replace the system
		board.

Keyboard, mouse, or USB device problems

Symptom	Action

All or some keys on the keyboard do not work.	1. Make sure that:
	• The USB keyboard cable is securely connected
	to a USB connector on the server. If the USB
	keyboard is connected to a USB hub, disconnect
	the keyboard from the hub and connect it directly
	to the server.
	• No keys are stuck.
	• The USB controller is enabled in the Setup Utility
	program. See “Using the Setup Utility program”
	on page 55.
	2. Restart the server.

176ThinkServer Hardware Maintenance Manual

389, 441, 388, 392, 391 specifications

Lenovo has established itself as a leader in the tech industry, particularly in the realm of laptops and PCs. Among its impressive lineup, the Lenovo series 387, 390, 393, 391, and 392 stands out for their innovative features, robust performance, and user-centric designs. These models cater to a range of users, from casual users to professionals who require high performance and reliability.

The Lenovo 387 is designed with versatility in mind. It comes equipped with an Intel Core processor that delivers snappy performance suitable for everyday tasks and even some heavy lifting with multimedia applications. The display features vibrant colors, making it perfect for streaming media or working on graphic design. Additionally, the 387 incorporates Lenovo’s advanced thermal management technology that ensures efficient cooling, preventing the device from overheating during intensive tasks.

Moving on to the Lenovo 390, this model emphasizes portability without compromising power. Weighing significantly less than its counterparts, the 390 is ideal for users who are always on the go. Its long-lasting battery life means users can stay productive throughout the day without searching for a power outlet. The 390 also features a high-resolution touchscreen, enhancing user interaction and providing a modern computing experience.

The Lenovo 393 further amplifies productivity features with its emphasis on connectivity. It comes with multiple USB ports, an HDMI output, and cutting-edge Wi-Fi technology for seamless networking. This model also boasts Lenovo's proprietary software, which simplifies file sharing and enhances collaboration, making it a strong choice for team-oriented projects.

For users interested in superior graphics and gaming performance, the Lenovo 391 is equipped with a dedicated GPU. This feature allows it to handle the latest games and graphic-intensive applications seamlessly. With an expansive display and high refresh rate, users can enjoy an immersive visual experience. Moreover, its customizable RGB backlit keyboard adds a touch of personalization.

Finally, the Lenovo 392 represents the pinnacle of balance between high-end features and affordability. It integrates smart AI capabilities that optimize device performance based on user habits, ensuring that it runs at optimal capacity. The 392 also prioritizes security with biometric login options and integrated privacy features, making it a trustworthy choice for sensitive tasks.

In summary, Lenovo's 387, 390, 393, 391, and 392 models showcase the brand's commitment to innovation, performance, and user satisfaction. Each model targets specific needs, ensuring that there is a suitable option for every type of user, from students to professionals and gamers. With advanced technologies and thoughtful designs, Lenovo continues to set the standard in the competitive laptop market.

Lenovo 388, 441, 393, 392, 391, 389 Memory module problems, Keyboard, mouse, or USB device problems

Models: 389 441 388 392 391 393 390 387