If you see video but can not hear audio, check all of the following:
Check that your DVD-ROM drive does not have the mute setting enabled.
My CD or DVD drive is not playing my CD or DVD properly
Make sure the optical drive is inserted correctly into the multipurpose drive bay.
Make sure the label of the disc is facing up.
If the disc requires software, make sure the software is installed according to the manufacturer’s instructions.
A dirty or damaged disc may cause the notebook to stop responding while it tries to read the disc. If necessary, restart the notebook, remove the disc, and then check it for dirt or damage.
Click Update in the System Properties window.
Verify that Delete From All Settings is selected and press OK.
Click Delete. The Confirmation window will appear.
Double click Disk Drive and confirm that GENERIC NEC FLOPPY DISK is shown.
The System Properties dialog box appears. Click the Device Manager tab.
Double-click Floppy Disk Controller and then click Standard Floppy Disk Controller.
Click Start, point to Settings, point to Control panel, and then click System
My floppy disk drive icon doesn’t appear even though it is connected
Check that the diskette is properly inserted into the floppy disk drive.
Troubleshooting
My floppy disk drive can not write to a diskette
If the diskette is write-protected, disable the write-protect feature or use a diskette that is not write-protected.

Check the volume setting in the audio mixer.

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Sony PCG-Z505LSK, PCG-Z505LEK manual Check the volume setting in the audio mixer

PCG-Z505LSK, PCG-Z505LE, PCG-Z505LS, PCG-Z505LEK specifications

The Sony PCG-Z505 series is a line of ultraportable laptops that gained popularity for their lightweight design and advanced features. Specifically, the models PCG-Z505LEK, PCG-Z505LS, PCG-Z505LE, and PCG-Z505LSK each showcase several key characteristics that make them stand out in the early 2000s laptop market.

One of the most notable features of the PCG-Z505 series is their incredibly lightweight design. Weighing around 3.5 pounds, these laptops epitomize portability, making them ideal for business professionals and students on the go. The sleek aluminum chassis not only contributes to the reduced weight but also enhances durability, ensuring that it can withstand everyday use.

In terms of display technology, the PCG-Z505 series incorporates a 12.1-inch LCD screen with a resolution of 1024 x 768 pixels. This size strikes a balance between usability and portability, allowing users to work comfortably while still being compact enough to fit into a briefcase. The brightness and clarity of the display also cater to varied lighting conditions, preserving the quality of visuals even in brighter environments.

Powering these laptops is an Intel Pentium III processor, which offers sufficient performance for everyday tasks such as web browsing, word processing, and multimedia consumption. Coupled with a RAM capacity of up to 512 MB, users can multitask efficiently, running multiple applications without significant slowdowns.

The series also features a variety of connectivity options, including USB ports, a VGA output, and a headphone jack. This ensures compatibility with a wide range of peripherals and external devices. Additionally, Sony included an integrated CD-ROM drive, allowing users to access software and media without requiring additional external hardware.

An integral aspect of the PCG-Z505 series is its innovative battery technology. These laptops come equipped with a lithium-ion battery that offers impressive longevity, catering to users who require extended usage without needing frequent recharges. This is especially beneficial for those who travel frequently or work in remote locations.

Overall, the Sony PCG-Z505 series, featuring the PCG-Z505LEK, PCG-Z505LS, PCG-Z505LE, and PCG-Z505LSK models, combines portability, performance, and practical features, making them an attractive option for anyone looking for a reliable ultraportable laptop in their day-to-day life. Their legacy continues to resonate among enthusiasts of vintage technology as a testament to Sony's commitment to quality and innovation in personal computing.